How long will a man take to walk around the boundary of a square field of area 25 hectares at the rate of 5 km/hr?

Explanation

Area = 25 \text{ hectares} = 250,000 \text{ m}^2. The side of the square field = \sqrt{250000} = 500 m. The perimeter (boundary) = 4 \times 500 = 2000 m = 2 km. Time taken = \frac{\text{Distance}}{\text{Speed}} = \frac{2}{5} hours. Converting to minutes: \frac{2}{5} \times 60 = 24 minutes.

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