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height of a building
firemen , construction workers and other workers often rely on the use of ladders in their line of work . for ex the height to a second story window may be 25 feet and a window cleaner may need to put the ladder ten feet away from the building in order to avoid bushes. so for this task the window cleaner will need a ladder this feet long -
25^2 + 10^2 = C^2
625 + 100 = 725
square root of 725 is 27
so the window cleaner would need a ladder 27 feet long.
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