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gizmo_the_mogwai [7]
2 years ago
5

I NEED HELP ON THIS ASAP!! GIVING 75 POINTS TO WHOEVER CAN HELP ME WITH THIS!!!

Mathematics
1 answer:
icang [17]2 years ago
5 0

Answer:

288pi

904.3

1648.5

33493.3

Step-by-step explanation:

1.

volume = 6^2 * 8 * pi = 288pi

= 904.32

2.

5^2*21*3.14 = 1648.5

3.

4/3 * 20^3 * 3.14 = 33493.3

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The diagram shows the cross-section of a wall of a cinema. It has to be painted. Work out the area that needs to be painted.
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Answer:

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Area of the wall of a cinema hall = Area of a trapezoid (1)+ Area of a rectangle (2) + Area of a trapezoid (3)

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Area of the rectangle (2) = Length × Width

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Area of the trapezoid (3) = \frac{1}{2}(12+10)\times 11

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