A rectangular grassy plot is 112 m by 78 m. It has a gravel path 2.5 m wide all around it on the inside. Find the cost of constructing it at ₹2 per square metre.

₹1500
₹1600
₹1750
₹1850

Correct answer: ₹1850

Solution

The inner dimensions are 112 - 5 = 107 m and 78 - 5 = 73 m. So path area = 112×78 - 107×73 = 925 sq m. At ₹2 per sq m, the cost is ₹1850.

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