Question

A solid cylinder of radius ‘r’ and height ‘h’ is placed over other cylinder of same height and radius. The total surface area of the shape so formed is?

Answer 1

total height of new cylinder formed=2h
radius=r

TSA=2*(22/7)*r*2h + 2(r*r)(22/7)
     =88rh/7+(44*r*r)/7
=44r(2h+r)/7