jane, ali and pat each planted a tree 90cm 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 2cm pat tree grow by 3 cm . how tall was jane tree when pat tree was 108 cm in height.
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Solution: let’s say jane’s tree grow by 1cm in X time, and in the same time ali’s tree grow by 2cm and pat’s tree grow by 3cm.
so to grow 108 – 90 = 18 cm, pat’s tree should take 18/3 = 6X time and jane’s tree should grow by 6cm in the same time.