Question

The inner diameter of a circular well is $3.5m$. It is $10m$ deep and area of the playground is $1584m^2$
Find its inner curved surface area,

• A. $110m^2$
• B. $210m^2$
• C. $140m^2$
• D. $250m^2$

Answer 1

The correct option is A $110m^2$

The well is in the shape of a cylinder. Curved Surface Area of a Cylinder of Radius "R" and height "h" $=2\pi Rh$

Hence, CSA of the well $=2\times \frac{22}{7}\times \frac{3.5}{2}\times 10=110sqm$