Question

a hollow cylinder of radius 5cm takes six turns about its axis on horizontal plane. and thereby covers a distance which is 6pi times its length . what is the area of the curved surface of cylinder​

Answer 1

Answer:

Distance covered ,

2*pi*r*6 =6*pi*L,

L=2r

Curved area=2*pi*r*L

=2*pi*r*2r

=4*pi*5*5

=100pi (answer)