Question

If one side of a square is increased by 5 metres and the other side is reduced by 5 metres, a rectangle
is formed whose perimeter is 30 m. Find the side of the original square.​

Answer 1

Answer:

15/2

Explanation:

let original side is x

(x+5)(x-5) is side of rectangle whose perimeter is 30 m

perimeter of rectangle = 2(l+b)

30= 2( x+5+x-5)

30=2(2x)

15=2x

x = 7.5 or 15/2