Question

A hollow cylindrical pipe is 28 m long. Its inner and outer diameters are 6 cm and 12 cm respectively. Find the volume of the metal used in making the pipe.

Answer 1

Answer:

Step-by-step explanation:

Ht. of cylinder=28m=2800cm

Inner and outer radius are 3cm and 6cm resp.Let r=3cm and R=6cm

So , vol of metal used=πR^2h-πr^2h

=> π(R^2-r^2)h

=> 22/7(36-9)2800

=> 22/7×27×2800

=> 22×400×27=

237600m^3

Hope it helps

Answer 2

Step-by-step explanation:

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