Question

the cost of levelling a square lawn at rupees 2.50 per square metre is rupees 17640 find the cost of fencing at rupees 5 per metre​

Answer 1

Answer: Rs 1680

Cost of leveling = Rs 17640

Cost = Area × Rate

17640 = Area × 2.50

Therefore,

Area = 17640 / 2.50

Area of square lawn = 7056 sq.m

Area of  square lawn = ( side )²

Side = √7056

= 84 m

Therefore,

Side of lawn = 84 m

Now, finding the perimeter,

Perimeter of square lawn = 4 × side

 = 4 × 84

Perimeter = 336 m

Therefore,

Cost of fencing at rupees 5 per metre:

Cost of fencing = 336 × 5

= Rs. 1680

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