Question

The altitude of a circular cylinder is increased six times and the base area is decreased to one-ninth of its value. write down the factor by which the lateral surface of the cylinder will increase.

Answer 1

nice question dude!

as we know tha lateral surface of a cylinder = (π*r*r)×l where l=altitude;

here area base is decreased to π*r*r/9
and altitude is increased to 6*l

Therefore final surface area=3(π*r*r)×l;