Question

The area of a rectangular invitation card is 3/10 square foot. given that the length of the card is 4/5 foot, find its perimeter.

Answer 1

First, you have to calculate for it's width.

3/10 = 4/5 * w

w = 3/10 * 5/4 = 3/8

Perimeter = 2(l+w) = 2(4/5 + 3/8)

P = 94/40 = 47/10 ft = 4.7 ft