Question

the sides of a rectangular Park are in the ratio 5 ratio 4 and its area is 3380 m square find the cost of fencing the park at the rate of 75 per metre square

Answer 1

Hey!

Let the length be 5x metre.
Let the breadth be 4x metre.
Area = 3380 sq metre.

By the problem,
5x×4x=3380
20x²=3380
x²=169
x=13

Hence, length = 13×5= 65 metre and breadth = 13×4= 52 metre.

Perimeter of the park = 2(65+52) = 234 metre.

Cost of fencing:

1 metre = ₹75
234 metre = ₹17550

Thank you!