Question

a lawn is in the form of rectangule whose sides are in the ratio
5:3.the area of the lawn is 3375msq.find the cost of fencing the lawn at rs 65 per meter

Answer 1

ratio of sides=5:3
sides=5x,3x
are of rectangle =5x*3x=15x2 (15x square)
15x2=3375
x2=225
x=15
sides= 15*5 , 15*3
=75,45
perimeter = 2(75+45)
=2(120)
=240 m
1 metre=65
240 metre=65*240
= 15600 rupees