Question

The cost of levelling a rectangular garden at rs 3.50 per sq.m is rs 8400. It's length and breadth are in the ratio 3:2 . Find the perimeter of the garden?

Answer 1

area=
$8400 \div 3.50 \\ l \times b = 2400 \\ 3x \times 2x = 2400 \\ 6 {x}^{2} = 2400 \\ {x }^{2} = 400 \\ x = 20 \\ l = 3x = 3 \times 20 = 60 \\ b = 2x = 2 \times 20 = 40$