Question

find the diameter of a cylinder whose height is 5cm and volume is equal to its curved surface area

Answer 1

 
radius = r cm
height = h= 5cm

volume of the cylinder = csa of the cylinder
πr²h = 2πrh

r²/r = 2πh/πh
r = 2
diameter = d= 2r
d= 2*2
d= 4 cm