Question

the csa of cylinder is 220cm.sq its base radius is 3.5cm then its height is

Answer 1

csa =220cm
r=3.5cm
h=?
csa=2^rh
220=2×22/7×3.5×h=10cm

Answer 2

CSA of cylinder =220cm.sq.

2πrh=220

πrh=110

22/7×3.5×h=110

22×0.5×h=110

11×h=110

h=10cm