Question

The inner diameter of a circular well is 3.5 meters and it is 10 meters deep, find the surface area of ​​its internal curve

Answer 1

diameter = 3.5 m
then radius = 1.75 m
 height = 10 m
 
So Surface area = 2 x pi x r x h
                          = 2 x 22/7 x 1.75 x 10
                         = 110 m

Plz write in the answer that my solution is correct or not