Question

The length of a rectangle is twice of its breadth if perimeter is 60 cm, gind its length

Answer 1

et the breadth of the field = x cm

∴ its length = 2x

and, its perimeter = 2 x (length + breadth)

= 2 x (2x + x)

= 2(3x)

= 6x cm

Perimeter = 60 cm

⇒ 60 cm = 6x cm

⇒ x = 60/6 = 10 cm

∴Breadth = x = 10 cm

Length = 2x = 2 x 10 = 20 cm