Question

The perimeter of a rectangle having area equal to 144 (cm)2 and sides in the ratio 4:9 is

Answer 1

let it's sides be 4y and 9y
∴9y×4y=144
36y²=144
y=√4
y=±2
y=2[∵length can never be negetive]
s₁=8cm
s₂=18cm
p=2(s₂+s₁)
p=48 cm