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Question
The cost of levelling and turfing a square lawn at Rs 2.50 per m2 is Rs 13322.50. Find the cost of fencing it at Rs 5 per metre.
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Solution
First, we have to find the area of the square lawn, which the total cost divided by the cost of levelling and turfing per square metre:
Area of a square= `13322.5/2.5=5329 m^2`
The length of one side of the square is equal to the square root of the area. We will use the long division method to find it as shown below:
∴ Length of one side of the square = 73 m
The circumference of the square is `73 xx 4 = 292` m
∴ Total cost of fencing the lawn at Rs. 5 per metre = `292 xx 5 = Rs. 1460`
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