Let be the outside radius, inside radius, and thickness respectively.
Thickness is by:
The volume is given by (volume of outside minus inside):
See what you did wrong?
The volume of a metallic cylindrical pipe is 748 cu.cm. Its length is 14 cm & its external radius is 9 cm. How do I find its thickness?
This is what I tried:
pi x r x r x h = 748
pi x r x r x 14 = 748
r x r = 17
r = 4.17 (this is the internal radius)
Now thickness = external radius - internal radius
thickness = 9 - 4.17 = 5.83 cm
But the answer is wrong. Can someone help me out with this?