The volume of cylinder pipe is 748cm. ito.
length is 0.14m se its internal radius us
find thickness of pipe.
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1 cm
Volume of a hollow Cylinder =π(R
2
−r
2
)h
Given, volume of the hollow cylinder =
7
22
×(9
2
−r
2
)×14=748cm
3
=>9
2
−r
2
=17
=>81−r
2
=17
=>r
2
=64
=>r=8cm
Thickness = Outer radius − Inner radius =9−8=1cm
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