The length of a rectangle is 8cm more than 3 times its width. the perimeter of the rectangl is 64cm. what are the dimensions of the rectangle

let the width be x

the length will be 8 + 3x

We use the formula:

2W + 2L = P

where W is width, L is Length, P is parameter of the rectangle

2 (x) + 2 (8 + 3x) = 64

2x + 16 + 6x = 64

2x + 6x = 64 - 16

8x = 48

x = 48/8

x = 6

Width is 6

Length is 8 + 3 (6) = 8+18 = 26

Therefore Length of rectangle is 26 cm and Width is 6 cm