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A hollow cylindrical tube is open at both ends is made of iron 4cm thick. If the external diameter be 52cm and the length of the tube be 120cm, find the number of cubic cm of iron in it?approx

72419

72425

72405

72411

Explanation:

H = 120 external diameter – 52
External radius = 26
Internal radius = 26-4 =22
Volume of iron = external volume – internal volume
22/7 * 26 * 26 * 120 – 22/7 * 22 * 22 * 120 = 72411

By: Amit Kumar

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