Question 357972
a cylinder is made of solid aluminum which has a unit weight of 165 lbs per cubic foot. what is the weight of this cylinder if the diameter is 4 feet and the height is 5 feet? 
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Volume of cylinder:
"area of base" * "height"
"PI*radius^2" * "height"
(3.14)(2^2) * 5
(3.14)(4) * 5
(3.14)(20)
62.8 cubic feet
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weight:
volume * density
62.8 * 165 = 10362 pounds