Question

The sides of a rectangular park are in the ratio 4:3. if its area is 2028 sq.m ,find the cost of fencing it at Rs 3 per metre

Answer 1

let say sides of rectangular field are 4x and 3x

area of park = 4x × 3x = 12x^2

$12x^{2}$

12x^2 = 2028 m^2

x^2 = 169

x = 13 m

length & width = 4×13 & 3×13

52 & 39 m

perimeter = 2×(52+39) = 2×(91) = 182m

cost of fencing Rs 3 per metre

co cost of fencing = 182×3 = 546 ₹

₹ 546