Question

The perimeter of rectangular photo is 72cm. The length is twice the width what are and width of the photo?

(Hint: The formula for perimeter is 2w+ 21= P where w is the width I is the length and P is the perimeter.)

Answer 1

w =12 cm

l = 24 cm

Explanation:

P = 2w + 2l

We know the perimeter is 72 and the length is twice the width (l = 2w)

Substituting P = 72 and l = 2w

72 = 2w + 2(2w)

72 = 2w+ 4w

Combine like terms

72 = 6w

Divide each side by 6

72/6 =6w/6

12 = w

Now we need to find l

l = 2w

l =2*12

l = 24