Question

A hollow Cylindrical pipe is 28m
long
inner and outer diameters are bem and 12cm
r 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