How tall was Jane tree when Pat tree was 108 cm in height?

Question

Jane, Ali and Pat each planted a tree 90 cm in height . In the time it took Jane’s tree to grow by 1 cm, Ali’s tree grow by 2 cm. By the time it took Ali tree to grow by 2 cm Pat tree grow by 3 cm .
How tall was Jane tree when Pat tree was 108 cm in height?

Answer 1

In the time Pat's tree grows 3 cm, Jane's tree grows 1 cm.
(1 cm Jane's tree = 2 cm Ali's tree and 2 cm Ali's tree = 3 cm Pat's tree -> 1 cm Jane's tree = 3 cm Pat's tree.)
Pat's tree has grown 108 - 90 = 18 cm.
In that same time Jane's tree grew 18 / 3 = 6 cm.
Jane's tree is thus 90 + 6 = 96 cm.