Question

A circular field of diameter 42 m needs to be cleaned. if the cost of cleaning the field is Rs. 2.35 per m2, find the cost of cleaning the field?​

Answer 1

Solution!!

The diameter of the circular field is given along with the cost of cleaning the field. We know that cleaning is to be done in the whole field, so we need to find the area of the field.

→ Diameter = 42 m

Radius = Diameter ÷ 2

Radius = 42 m ÷ 2

→ Radius = 21 m

Area = πr²

Area = (22\7) × 21 m × 21 m

Area = 22 × 3 m × 21 m

→ Area = 1386 m²

Cost of cleaning per m² = Rs 2.35

Cost of cleaning 1386 m² = Rs 2.35 × 1386

Cost of cleaning the field = Rs 3257.1