Find
(1) The total surface area of a closed cylindrical petrol storage tank whose diameter
4.2 m. and height 4.5 m.
(i) How much steel sheet was actually used, if 1/12
of the steel was wasted in making
of the tank. (anewer quickly and steps in order )​

Answers

Answer 1

Answer:

The amount of steel used = 94.38 [tex]m^{2}[/tex]

Step-by-step explanation:

Height of the tank = 4.5 m.

Diameter of the tank = 4.2 m.

But,

radius = [tex]\frac{diameter}{2}[/tex]

           = [tex]\frac{4.2}{2}[/tex]

radius  = 2.1 m

Total surface area of a cylinder = 2[tex]\pi[/tex]rh + 2[tex]\pi[/tex][tex]r^{2}[/tex]

                                      = 2[tex]\pi[/tex]r(r + h)

                                      = 2 x [tex]\frac{22}{7}[/tex] x 2.1 (2.1 + 4.5)

                                      = 44 x 0.3 (6.6)

                                      = 87.12

Total surface area of a cylinder = 87.12 [tex]m^{2}[/tex]

Since [tex]\frac{1}{12}[/tex] of the steel was wasted, then;

[tex]\frac{1}{12}[/tex] x 87.12 = 7.26 [tex]m^{2}[/tex]

Actual area of steel sheet used = 87.12 + 7.26

                                                     = 94.38 [tex]m^{2}[/tex]

Thus, 94.38 [tex]m^{2}[/tex] of steel was used in making the tank.


Related Questions

Plz help me with this

Answers

16 !!!!!!!!!!!!!!!!! 32 divided by 2 is 16
Have a cute puppy!! It’s my puppy

Which could NOT be the length of the unknown side of the triangle?
A. 12
B. 14
C. 15
D. 18

Answers

Answer:

The answer is c 15 for the triangle

Step-by-step explanation:

The number of eggs in the refrigerator e decreased by 9 equals 19. Enter an equation to represent the situation.​

Answers

Answer:

e - 9 = 19

Step-by-step explanation:

Hope that helps!

Answer:

x-9= 19

x= 19+9

x= 28

to check if answer is correct say

28 - 9 = 19

so there are 28 eggs in the refrigerator

if the GCF is factored out of both terms in the expression 24x + 36y, what is the equivalent expression?

I’m just confused about factoring out the GCF

Answers

12(2x + 3y)

When you have two different variables, and you’re told to factor out the GCF, you can pretty much ignore the variables & focus on the numbers.

So this is kind of asking what is the GCF of 24 and 36.

I hope that helps some. LMK if you have have questions.

How do you find the y-intercept of a line if you have the slope and a point? Describe the steps in order.

Answers

Using the "slope-intercept" form of the line's equation (y = mx + b), you solve for b (which is the y-intercept you're looking for). Substitute the known slope for m, and substitute the known point's coordinates for x and y, respectively, in the slope-intercept equation. That will let you find b.

Hope that helps!!!!

Answer:

it's the y value of the point where the line intersects the y- axis. For this line, the y-intercept is "negative 1." You can find the y-intercept by looking at the graph and seeing which point crosses the y axis.

Step-by-step explanation:

I hope this picture help you

5 red marbles
6 blue marbles
3 green marbles
4 black marbles
2 yellow marbles


A marble will be drawn from the bag and replaced 100 times. What is a reasonable prediction for the number of times a green or black marble will be drawn?

Answers

Answer:

green= 3/20. black =4/20 or 1/5

Step-by-step explanation:

green = 3

black = 4

total = 20

green = 3/4

black = 4/20 = 1/5

Find the length of the missing side

Answers

Answer:

C

Step-by-step explanation:

Using Pythagoras' identity in the right triangle

c² = 4² + 5² = 16 + 25 = 41 ( take the square root of both sides )

c = [tex]\sqrt{41}[/tex]  ← exact solution → C

pls help with mathhh !
thx !

Answers

Answer:

z = 65

Step-by-step explanation:

z + 81 + 34 = 180 (Sum of angles in a triangle is 180)

z + 115 = 180

z = 180 - 115

z = 65

z=65 i’m prtty sure..........

WILL GIVE BRAINLIEST IF ANSWERED CORRECTLY!!!!!!


LMNP is rotated 90' clockwise around the origin.
8
7
6
5
4
M(3, 4) N(5, 4)
3
2
1
LO1)
2
P19,0)
3
4
5
6
7
8
9
What are the coordinates of N'?
O A. N'(4,-5)
O B. N'(-5, -4)
C. N'(-4,5)
D. N'(5,-4)

Answers

Answer:

B

Step-by-step explanation:

Answer:

im not sure but it may be B as if i cant see the photo

Step-by-step explanation:

tell me if i got it right or wrong :)

answer for a brainlist!!!!

Answers

Answer:

Market A

Step-by-step explanation:

MA) 28/12= 2.33333

MB) 23.75/10= 2.375

MC) 15.75/6=2.625

Market A has the best price per shrimp

HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP

Answers

Answer:

C

Step-by-step explanation:

Hello There!

so

y = -5x^2 + 8x +4

where y = height of ball and x = seconds after ball was thrown

The plus 4 is the y intercept and because y equals height of ball the 4 would represent the height that the ball was thrown at

~TheMathWiz

Answer:

It is C

Step-by-step explanation:

3. F (7,-2). If F is rotated 90 degrees about the origin. What are the
coordinates of F?

Answers

Well you said the Coordinates of F  (7,-2) rotated 90 degrees

Translate the description as an algebraic expression:
the difference of 4 and the absolute value of m

Answers

Answer:

4 - | m |

(Absolute value of something is denoted by writing the value between two perpendicular lines.)

Which one is smaller

Answers

Answer:

Jasmine

Step-by-step explanation:

Michelle: .75

Mike: .66

Rasheed: .83

Jasmine: .57

Point-Slope
Instructions: Write the equation of the line in Point-Slope Form given the information below.
Slope =
Point = (1,4)
Point-Slope Form:
Check
7

Answers

Answer:

Look below.

Step-by-step explanation:

Point slope formula: y-y1=m(x-x1)

Point: (1,4)

First you have to plug in our point and the slope (m) if we had one.

1 will be plugged into x1 while 4 will be plugged into y1.

Answer: y-4=m(x-1)

This is as much as we can do with the information provided.

Law of sines problem, please help. solving for x

Answers

Answer:

x = 62.9° (3 sig. fig.)

Step-by-step explanation:

Simply by using the cos law,

cosx = (1.3² + 2.1² - 1.9²)/2(1.3)(2.1)

x = 62.9° (3 sig. fig.)

$10,000 compounded every 2 years with a 10% interest rate. How much will this be worth in 10 years

Answers

$110,000

I got this answer from multiplying 10,000 by 10 then adding 10% of 10,000 (which is one thousand) 10 times, which got me an additional 10,000, and that's how I got my answer. Please comment on this answer and tell me if it is wrong, I really hope it isn't wrong. I also hope this helps you on your way, have a great day!

PLEASE HELP I’LL GIVE YOU BRILLIANCE

Andrew has $350. She spends the same amount each week. After 5
weeks, she has $150 remaining. The relationship between the amount of
money Andrew has and the number of week s is represented by a line.
CREATE A TABLE OF VALUES for this scenario up to week 5 and then state
the rate of change of this scenario. *
-$50/week
$40/week
$50/week
-$40/week

Answers

Answer:

-40

Step-by-step explanation:

the equation will be 5x + 350 = 150

5x = -200

x = $-40/week

Answer:

I would say D

Step-by-step explanation:

Good Luck!

Jerome wants to walk to school. He lives 2 and 1/4 miles away. So far, he has walked 7/8 of a mile. How far does he have left to go?

Answers

Answer:

2 miles

Step-by-step explanation:

I really need help Please thank you​

Answers

Answer:

D

Step-by-step explanation:

the median is 85, the mean is 85, the mode is 80.

it can't be A, B, or C. so it must be D.

PLS HELP ILL GIVE BRAINLIEST


Explain how symmetry can help you find a figure's perimeter on the coordinate plane.

Answers

Answer: Think of it this way, symmetry is basically a mirror and you can better find the perimeter because you'll know that the sides are the same length

Step-by-step explanation:

Well if you have two sides that are symmetrical or an entire shape is symmetrical you can find the perimeter easier. So let's say two lines are symmetrical and one has the length of 2 the other one can also be two. If we have a symmetrical shape, then is would be a complete reflection.

A geometric object or form is symmetric when it can be broken up into two or more identical pieces and then placed in a systematic way.

what is symmetry ?

The definition of symmetry is a proportionate and balanced similarity between two sides of an object, where one half is the mirror image of the other. For instance, certain geometric forms like, rectangle, and circle are symmetric along their respective axes of symmetry.

since the shape's two halves would perfectly match if you folded it along the line. The shape will also remain unchanged if a mirror were positioned along the line , a square has four lines of symmetry.

A geometric object or form is symmetric when it can be broken up into two or more identical pieces and then placed in a systematic way.

To know more about symmetry visit :-

brainly.com/question/15970176

#SPJ2

A tabletop in the shape of a trapezoid has an area of 5,550 square centimeters. Its longer base measures 115 centimeters, and the shorter base is 85 centimeters . What is the height?

Answers

Answer:

55.5 cm

Step-by-step explanation:

[tex]h=2*\frac{A}{a+b} \\\\h=2*\frac{5550}{115+85} \\\\h=2*\frac{5550}{200} \\\\h=2*\frac{111}{4} \\\\h=55.5[/tex]

SU and VT are chords that intersect at point R. A circle is shown. Chords S U and V T intersect at point R. The length of S R is x + 6, the length of R U is x, the length of V R is x + 1, and the length of R T is x + 4. What is the length of line segment VT? 4 units 8 units 13 units 14 units

Answers

Answer:

13units

Step-by-step explanation:

If SU and VT are chords that intersect at point R, then;

SR/RT = VR/RU and VT = VR + RT

Given the following

SR= x+6

RU = x

VR = x+1

RT = x+4

Substitute into the expression above;

x+6/x+4 = x+1/x

Cross multiply

x(x+6) = (x+1)(x+4)

Expand

x^2+6x = x^2+4x+x+4

x^2+6x = x^2+5x+4

x^2 will cancel out from both sides

6x = 5x+4

6x-5x = 4

x = 4

Get VT

VT = VR + RT

VT = x+1 + x+4

VT = x+x+1+4

VT = 2x+5

Since x = 4

VT = 2(4) + 5

VT = 8+5

VT= 13 units

Hence the length of the line VT is 13units

Answer: just so you have proof my homie above is correct

Step-by-step explanation:

got it right on edge

what is 3/4x2/3

a.5/12
b. 6/12
c.5/7
d. 6/7

Answers

Answer:

b is the correct answer

Step-by-step explanation:

hope this helps

Plz help me
It algebra

Answers

the answer is x = z/w - c/w

anyone knows the answer

Answers

232 jdjdjsbsihdjdjdkkdjdjddo

What is the range of the ordered pairs (1,1), (2,6), (3,5), and (4,1)?

Answers

Answer:

45

Step-by-step explanation:

just cuz

Answer:

45

Step-by-step explanation:

Y'all what's the answer?

Answers

Parallel = has same slope
On points( 3,4) (-2,2)
(2-4)/(-2-3) = -2/-5 = 2/5 slope

Use same formula: (y2-y1)/(x2-x1)

Find the slope of the other points:
(-2,-5) and (-7,-3)
(-3-(-5))/(-7-(-2)) = 2/-5 = -2/5

(-1, 1) and (-6, -1)
(-1-1)/(-6-(-1)) = -2/-5 = 2/5

(0,0) and (2,5)
(5-0)/(2-0) = 5/2

(1,0) and (6,2)
(2-0)/(6-1) = 2/5

(3,0) and (8,2)
(2-0)/(8-3) = 2/5

Which has same slope of 2/5?
You can see :)



1. Calculate the scale factor.
a. ⅓ b. ½ c. 2 d. 3

2. Find the value of x.
a. 3•0m b. 3•5 c. 4•5 d. 6•0​

Answers

Answer:

eeeeeeeeeeeeeeeeeeeeeeeeeeeee

Step-by-step explanation:

Tracy bought a new silk shirt. The shirt is on sale for 20% off the original price. If the original price was $56, what is the sales price of the shirt.
Group of answer choices
$11.20
$48.80
$44.80
$38.80

Answers

Answer:

$44.80

Step-by-step explanation:

$56 * 0.2 (%20) = $11.20

$56 - $11.20 = $44.80

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