Alanna and Kailyn each plant a small tree in the park. Alanna's tree is 6 inches tall when she plants it, and it grows 2.5 inches each month. Kailyn's tree is 12.6 inches tall when she plants it, and it grows 1.4 inches each month. After how many months will the two trees be the same height?
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1 Answer

Let the time in month when two trees are of same height be m.

then,

6+2.5m = 12.6+1.4m

or 2.5m - 1.4m = 12.6 - 6

or 1.1m = 6.6

or m = 6.6/1.1 = 6

So in 6 months the height of both trees will be same.
by Level 8 User (30.1k points)

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