Question

The curved surface area of cylinder is 1980 cm2 and the radius of its base is 15 cm find height of cylinder pie value 22/7

Answer 1

CSA of cylinder=1980cm2 (Given), radius = 15cm(given) : CSA of cylinder = 2 pie rh. 1980= 2.22/7.15.h=1980, now, 1980=44/7.15.h, 1980= 660/7.h, this implies: h=1980.7/660and h=21cm . so, height of cylinder=21cm.