Question

The length of a rectangle is twice it’s width the perimeter of the rectangle is 42cm

Label the diagram with the correct length and width for the rectangle

Answer 1

Width = 7 cm and length = 14 cm

Explanation:

Let width be b.

Length = 2b

The perimeter of the rectangle is given by :

P = 2(l+b)

We have, P = 42 cm

42 = 2(2b+b)

21 = 3b

b = 7

Width = 7 cm

Length = 2(b) = 2(7) = 14 cm