Question

The perimeter of a rectangle is 24 in. and its length l is 3 times the width w. What is the length and width (l, w) of the rectangle?(9, 3)(12, 4)(3, 9)(14.4, 4.8)

Answer 1

let length is 3x

the width be x

perimeter of rectangle is 2(l+b)

24=2(3x+x)

24=2(4x)

24=8x

divide the both side by 8

`(28)/(8) = (8x)/(8)`

x=3

therefore length is 3×3=9

width is 3