The curved surface area of a cylinder is five times the area of its base. Find the ratio of the radius and height of the cylinder.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 2 : 5
Let the radius and height be 'r' and 'h'.
CSA of cylinder = Area of the base of the cylinder.
2rh = 5r2
h/r = 5/2.
r : h = 2 : 5.