Question

the thickness of a hollow metal cylinder is 2 cm 70 cm long with outer radius of 14 cm find the volume of metals required to make a the cylinder assuming it is open at both end also find its weight the metals with 8 gram per centimetre cube

Answer 1

Hope this answer will help you
volume of outer cylinder =
$\pi {r}^{2} h \\ \frac{22}{7} \times 14 \times 14 \times 70$
=43120
volume of inner cylinder =
$\frac{22}{7} \times 12 \times 12 \times 70$
=31680
volume of metal used in cylinder =