Question

A roll of newspaper of lenght 7000m and thickness 0.022cm is rolled into a solid cylinder then its radius is

Answer 1

circumference= length of newspaper=7000m=2$\pi$r
2$\pi$r=7000
$\pi$r=7000/2=3500m
r= 3500 x 7/22

Answer 2

Answer:

Volume of cuboid equal to volume of cylinder