Question

A rectangular field is 15m long and 10m wide. Another rectangular field having the same perimeter has its sides in the ratio 4:1. Find the dimension of the rectangular field.

Answer 1

Perimeter=2×(l+b)

perimeter=2×(15+10)

perimeter=2×(25)

perimeter=50m

perimeter is same

ratio=4:1

perimeter= 2×(l+b)

perimeter=2×(4x+1x)

perimeter=2×(5x)

50=10x

X= 50÷10

X= 5

1rst side= 20m

2nd side=5m