Question

If 1 kg of fertilizer covers an area of half square metre, find the amount of fertilizer required by a farmer for his circular field whose radius is 14m.

Answer 1

If 1 kg of fertilizer covers an area of half square metre

Fertilizer required for 1 square meter = 1kg ÷ (1/2) = 2 kg

radius of circular field = 14m

Area = π×r^2 = 22/7 × 14 ×14 = 616 sq. m

fertilizer required = 616 × 2 = 1232 kg

Answer 2

Find the area of the circular field:

Area = πr²

Area = π(14)² = 616 m²

Find the amount of fertiliser required:

1/2 m² = 1 kg

1 m² = 1 x 2 = 2 kg

616 m² = 2 x 616 = 1232 kg

Answer: 1232 kg of fertiliser is required.