Question

Length of a rectangle is three times its width. The perimeter of the rectangle is 40 cm . Find its length.
5 cm
10 cm
15 cm
20 cm​

Answer 1

Answer:

15

Step-by-step explanation:

let the breath be x

length will be 3x

perimeter =40

40 = 2(3x + x)

40/2 = 4x

20 = 4x

x = 5

length = 5*3 = 15