Question

the length of a rectangle is three times its breath if the area of the rectangle is 1875 square cm find its perimetre

Answer 1

let the breadth be x cm then length will be 3x
on multiplying 3x^2 =1875
x^2=625
so,x=25 cm
hence p=2×4x=100×2cm=200 cm

Answer 2

Breadth = x, length = 3x

Area = length x breadth

1875 = (x)(3x)

1875 = 3x^2

x^2 = 1875/3

= 625

x = square root of 625

x = 25 cm

Breadth = 25 cm, Length = 25*3 = 75 cm

Perimeter = 2(Length + Breadth)

= 2(25 + 75)

= 2(100)

Perimeter = 200 cm.

Hope this helps!