SOLUTION: A hollow metal cylinder is 3cm long, 4cm in external diameter and the metal is dmm thick. The density of the metal is 2.8g/cm3. Find the mass of the cylinder.

Algebra ->  Volume -> SOLUTION: A hollow metal cylinder is 3cm long, 4cm in external diameter and the metal is dmm thick. The density of the metal is 2.8g/cm3. Find the mass of the cylinder.      Log On


   

Question 1044232: A hollow metal cylinder is 3cm long, 4cm in external diameter and the metal is dmm thick. The density of the metal is 2.8g/cm3. Find the mass of the cylinder.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
The inside diameter is %284-2%2A%28d%2F10%29%29cm, or the inner radius is 2-d%2F10 centimeters.

Volume of the hollow cylinder is 3%2Api%2A%282%5E2-%282-d%2F10%29%5E2%29%2Acm%5E3.
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3pi%284-4%2Bd%2F5%2Bd%2F5%2Bd%5E2%2F100%29
3%28pi%29%282d%2F5%2Bd%5E2%2F100%29

Mass will use density 2.8g%2Fcm%5E3 as a factor.
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highlight%282.8%2A3%28pi%29%282d%2F5%2Bd%5E2%2F100%29%29
Simplify in whatever way you prefer or need.