Question

The inner diameter of a circular well is 7 meter and  it is 10 meter deep. Its inner curved surface area is​(trisha)​

Answer 1

Diameter of well = 7m

Radius of well = 7/2 = 3.5m

Height of well = 10m

Curved surface area of well = 2πrh

$= 2 \times \frac{22}{7} \times \frac{35}{10} \times 10$

$= \frac{2 \times 22 \times 35}{7} = 2 \times 22 \times 5 = 220$

Thus, the curved surface area of well is 220m²