Question

If the sum of areas of two ends of a right circular cylinder is half of its curved surface area then find the ratio of diameter and height​

Answer 1

Let height = x, diameter = 2x⇒radius=x

Curved surface area = 2πrh=2π×x×x=2x 2 π

Area of 2 ends = 2πr ^2

=2πx ^2

∴ Required ratio = 2x ^2 π:2x ^2

π=1:1