The length of a rectangle is three times the width. If the perimeter is 36 cm, the width is:

A 4.4 cm

B 4.5 cm

C 4.3 cm

D 5.4 cm

Correct Answer: Option B

Suppose, width=x cm length=3x cm perimeter=2(x+3x)=8x here, 8x=36 or,x=36/8 or,x=4.5