Question

the volume of cylindrical pipe is 748 cm cube if its length is 40 cm and external radius is 9 cm find the thickness of Pipe?

Answer 1

V=748cm3
Length =14cm
Radius =9cm
748=pie*+(R^2-r^2)
748=22/7(9^2-r^2)
748*7/14*22=9^2-r^2
17=81-r^2
r^2=81-17
r^2=64
r=8cm

Thickness=R-r
9-8=1cm
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