Question

a cylindricalpillar is 28cm in diameter and 3m height. what is its curved surface area

Answer 1

CSA=pi×r×h
=22/7×14×300
=44×300
=13200cm^2 or 132m^2

Answer 2

Cylinder:-
d=28cm
r=14cm
h=3m X 100cm
  =300cm
CSA of cylindrical pillar=2πrh
                                       =2X22/7X14X300
                                       =2X22X2X300
                                       =26400cm^2