Question

An Iron pipe 20 CM long has exterior diameter is 25cm . If the thickness of pipe is 1cm , Find it's surface Area. ​

Answer 1

Answer:

3168 cm^2

Step-by-step explanation:

R=12.5cm

thickness of pipe=R-r

1=12.5-r =r=11.5cm

TSA=2π(12.5*20+11.5*20+{(12.5)^2-(11.5)^2}

=44/7*504

=3168 cm^2

Mark me as the brainliest....

HOPE THIS HELPS YOU.....