Question

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

Answer 1

well can be assumed as cylinder,CSA of cylinder is 2πrh

r=d/2=>r=4/2=>2

2*22/7*2*29=125(approx)

Answer 2

well is in the shape of cylinder.

radius =diameter/2=4/2=2m

depth =height=10m

curved surface area of well= 2πrh

=2×22/7×2×10

=125.71sq.cm

curved surface area of well=125.71sq.cm

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