Question

The perimeter of a rectangular from lawn of a library is 192 ft. The ratio os the length to width is 5:3. Find the area of the lawn

Answer 1

A) 2L + 2W = 192
B) 3L = 5W
Multiplying B) by -2/3
B) -2L  +3 (1/3)W  = 0 then adding this to A)
A) 2L + 2W = 192
5 (1/3) W = 192
W = 36
L = 60
Area of the lawn = 36 * 60 = 2,160