Question

find the curved surface area of well of diameter 4m and depth of is 10m​

Answer 1

well is cyclinderical in shape

curved surface area of cyclinder is 2πr2h

=2×22/7×2×10

=125.72m2

Answer 2

CSA of cylinder is

$2\pi \: rh$

so well is in cylinder shape

CSA=2×22/7×4/2×10

= 125.7142