Question

the cost of levelling a rectangular garden at ₹3.50 per sq m is 8400. its length and breadth are in the ratio 3:2 find the perimeter of garden

Answer 1

$l = 3x \\ b = 2x \\ cost \: of \: levelling = l \times b \times 3.50 \\ 8400 = 3x \times 2x \times 3.50 \\ 8400 = 6 \times 3.50 \times {x}^{2} \\ {x}^{2} = 8400 \div 21 \\ {x}^{2} = 400 \\ x = 20 \\ l = 3 \times 20 = 60 \\ b = 2 \times 20 = 40 \\ perimeter \: = 2(l + b) \\ = 2(60 + 40) \\ = 2 \times 100 \\ = 200 m$

Answer 2

Answer:

Step-by-step explanation: