Question

The cost of levelling a square lawn at Rs 15 per square metre is Rs 19,935. Find the cost of fencing the lawn at Rs 22 per metre.

Answer 1

The cost of levelling a square lawn at Rs `15` per square metre is Rs `19,935.`
`:.` Area of the square lawn ` = 19935/15 = 1329m^2`
`:.` Side of the square lawn `(a) = sqrt(1329) = 36.45m`
Perimeter of the lawn, `(P) = 4a = 4**36.35 = 145.80m`
So, cost of fencing the lawn at Rs 22 per metre `= 145.80**22 = 3207.60` Rs
So, the required cost will be `Rs 3207.60`.