The cost of cultivating a square field at the rate of Rs. 160 per hectare is Rs. 1440. the cost of putting a fence around it at 75 paisa per meter is?

Q: The cost of cultivating a square field at the rate of Rs. 160 per hectare is Rs. 1440. the cost of putting a fence around it at 75 paisa per meter is?

Area = 1440 / 160 hectares = 9 hectares = 90000 m2 ∴ One side = √90000 m = 300 m So perimeter = 4 x 300 m = 1200 m ∴ Cost of fencing = Rs (1200 x 75) / 100 = Rs. 900

Rs. 900
Rs. 1800
Rs. 360
Rs. 810

Correct Answer: Rs. 900

Explanation:

Area = 1440 / 160 hectares
= 9 hectares
= 90000 m²
∴ One side = √90000 m
= 300 m
So perimeter = 4 x 300 m
= 1200 m
∴ Cost of fencing = Rs (1200 x 75) / 100
= Rs. 900

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