human
A mother planted a 16-inch tree on her son's first birthday. On the day the tree was planted, the boy was 24 inches tall. If the tree grows twice as fast as the boy does, how tall will the tree be by the time the boy is 36 inches tall?
assistant
How many inches did the boy grow? ** The boy grew 36 - 24 = <<36-24=12>>12 inches since the tree was planted.
How many inches did the tree grow? ** Since the tree grows twice as fast as the boy, it will have grown 12*2 = <<12*2=24>>24 inches during this time period.
How tall will the tree be? ** Thus, the final height of the tree is 16 + 24 = <<16+24=40>>40 inches.
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