math
posted by Anonymous on .
The sides of a rectangle are in a ratio. What is the length of the shorter sides of the rectangle if its perimeter is 42 cm?

Ratio = 2:5?
P = 42 cm.
X cm = Long side.
2x/5 cm = Short side.
2x + 2*2x/5 = 42 cm.
10x + 4x = 210
14x = 210
X = 15 cm.
2x/5 = 2*15/5 = 6 cm.