Question

A lawn is in the form of a rectangle whose sides are in the ratio 5:3 and its area is 3375 m² . Find the cost of fencing the lawn at Rs.20 per metre.

Answer 1

Let the length and breadth of the lawn be 5 x m and 3 x m respectively. 

Now,

Perimeter of the lawn = 2 (Length + breadth) = 2 (75 +45) = 2 x 120 = 240 m

Total cost of fencing the lawn at Rs 20 per meter = 240 x 20 = Rs. 4800