Question

The depth of a circular well is 20cm and its inner diameter is 4.2 m Find its inner curved surface area​

Answer 1

Step-by-step explanation:

inner diameter of the well = 4.2m

radius = 4.2/2 = 2.1 m

depth or height of the wall =12 m

curved surface area of cylinder = 2πh

2*22/7*2.1*12

1108.8/7

158. 4m²

so, inner curved surface area of the well is 158.4m²