Question

A well is dug whose diameter is 4m and the depth is 10m. Find the quantity of earth taken out? Calculate the cost of plastering the curved (inner) surface at Rs.500 per square meter(take π=3.14).

Answer 1

Hi buddy

Here is your answer

Answer 2

Step-by-step explanation:

Diameter of well = 4 m .

therefore radius of well = 2 m

Depth of well = 10 m

the quantity of soil taken out = π(2)²× 10 m ³

= 3.14 × 4 × 10 m ³

= 125.6 m ³

again , radius of well = 2 m

Depth of well = 10 m

curved surface area of well = 2 π ×2 ×10 m²

= 3.14 × 4 × 10 m²

= 125.6 m ²

Total cost of colouring = Rs ( 125.6 × 500 )

= Rs 62800