A cylindrical metal pipe 1m long has an outer diameter of...
A cylindrical metal pipe 1m long has an outer diameter of 7.2cm and an inner diameter of 2.8cm. Find the volume of metal used for the cylinder
440πcm3
1100πcm3
4400πcm3
1100πcm3
Correct answer is A
Volume of cylinder pip (V) = πh(R2 - r2)
= 100π(7.22 - 2.82)
= 100π(51.84 - 7.84)
= 100π x 44
= 440πcm3
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