Question

The perimeter of a rectangular paper =56cm.length is three times its width, what is the width

Answer 1

Answer:

lets considered,

Width = x

length = 3x

Perimeter of rectangle = 2(l+b)

56 = 2 ( 3x + x )

56 = 6x + 2x

56 = 8x

x = 7 cm

width = 7 cm

length = 3 x 7 = 21 cm.

Answer 2

Step-by-step explanation:

Perimeter of rectengle = 2 ( l + b )

let width be x cm, then

3x = x ( given in question)

56 cm = 2 ( 3x + x )

56 cm = 2 × 4x

56 cm = 8x

x = 56 ÷ 8

x = 7

width = 7 cm

length = 3 × 7 = 21 cm. ANS