Question

The area of a square is 81m2.find the cost of fencing it 2 times at the rate of rupees 7.50.per metre

Answer 1

area = side ²= 81m²
side = 9m
We have to fence it 2 times.
so we need to fence 2 × perimeter
2×4×9
=8×9
=72m
Rate =7.5 rs per m
so total cost = 7.5×72=540rs