Larry and Barry want to pick apples out of the tree, but neither is tall enough to reach the apples. Barry can reach apples that are 5 feet high. Larry is 5 feet tall, but his shoulder height is 20% less than his full height. If Barry stands on Larry's shoulders, how high can they reach?
Let's think step by step.
9
Larry's shoulder height is 20% less than 5 feet, or 0.

2 * 5 = 1 foot less than 5 feet.

One foot less than 5 feet is 5 - 1 = 4 feet.

If Barry stands on Larry's shoulders, they can reach 4 + 5 = 9 feet.

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Final answer: 9