Question

The diameter of a metal pipe is 21cm and height 14cm . Find the total surface area .

Answer 1

tsa of cylinder=2πr(h+r)

guven diamtere=21cm;radius=21/2=10.5cm

height=14cm

=2*22/7*10.5(14+10.5)

=2*22*1 .5(24.5)

=1617cm^2