Question

the radius of base of a cylinder is twice the height of a cylinder. if the volume of the cylinder is 4312cm^, find a the height b the redius c the leteral surface area.

Answer 1

Solution is in the attached image..

Answer 2

r = 2h

pi*r^2*h is 4312

Putting value of r = 2h

4h^2 = 196

h = 7 cm
So r is 14cm

Hence, LSA is 2*pi*r*h
= 616 cm^2