Question

The length and breadth of a rectangular are in the ratio 5:3 .If the cost of reaping the field at 85 paise per square metre is Rs 624.75 find the cost of fencing it at the rate of Rs 4per metre

Answer 1

length --- 5x m
width ----- 3x m
Area = 15x^2 m^2

15x^2 *.84 = 624.75

solve for x, and from there find the length and width.
Perimeter = 2length + 2 width
= 10x + 6x = 16x

cost of fencing = 4(16x) = 64x = .....