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1 year ago

SOMEONE PLEASE HELP ME

Mathematics

1 answer:

vodomira [7]1 year ago

4 0

Answer:

829.5 cubic units

Step-by-step explanation:

When a rectangle is rotated about the line that is parallel to one of its sides, then a hollow cylinder is formed.

Inner radius = r = 4 units

Outer radius = R = 4 +3 = 7 units

h = 8 units

Volume of the hollow cylinder = π (R² - r²)*h

= π( 7² - 4²) * 8

= π * ( 49 - 16)* 8

= 3.142 * 33 *8

= 829.48

= 829.5 cubic units

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