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A cylinder pipe, made of metal is 3cm thick.If the internal ...

A cylinder pipe, made of metal is 3cm thick.If the internal radius of the pope is 10cm.Find the volume of metal used in making 3m of the pipe.

A.

153πcm3

B.

207πcm3

C.

15 300πcm3

D.

20 700πcm3

Correct answer is D

Volume of a cylinder = πr2h

First convert 3m to cm by multiplying by 100

Volume of External cylinder = π \times 132 \times 300

Volume of Internal cylinder = π \times 102 \times 300

Hence; Volume of External cylinder - Volume of Internal cylinder

Total volume (v) = π (169 - 100) \times 300

V = π \times 69 \times 300

V = 20700πcm3