Question

the length of a rectangle is five inches less than three times its width . if the perimeter of the rectangle is 150 inches , find the dimensions.

Answer 1

Explanation:

let x be the width of the rectangle.

given

length =

`3x - 5`

inches.

also given Length + Width = 150 inches,

`3x - 5 + x = 150 \\ 4x - 5 = 150 \\ 4x = 150 + 5 \\ 4x = 155 \\ x = 155 / 4 \\ = 38.75in`

Since

Length = 3x-5 in

Width = x in,

Length = 3(38.75) - 5 = 111.25 in

Width = 38.75 in