Posted by **Mary** on Friday, November 28, 2008 at 5:41am.

The Ratio of the hieght of plant X to plant Y is 5:3. If plant Y were 140 c.m. taller instead, the ratio of the hieght of plant X to plant Y would be 1:2. How tall is plant X

- Ratio -
**Jake1214**, Friday, November 28, 2008 at 8:44am
Translate these info into equations:

y=3/5x

x=5/3y

y+140=2x

Now you can use substitution method to solve for x easily.

- Ratio -
**Reiny**, Friday, November 28, 2008 at 10:55am
alternate solution:

let the height of pant X be 5x

let the height of plant Y be 3x

5x/(3x+140) = 1/2

10x = 3x+140

x= 20

then X = 5x = 100

Y = 3x = 60

check : if 140 is added to 60, Y = 200

then X:Y = 1:2

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