GMAT Quantitative Reasoning Practice Test 4

Question : 71 of 100

Marks: +1, -0

120 beavers, working together in a constant pace, can build a dam in 3 hours.
How many hours will it take 12 beavers that work at the same pace, to build the same dam?

Validate

Solution:

20 beavers worked 3 hours; therefore 60 hours of work were needed to build the dam.
60 hours / 12 beavers

=5

hours of work to complete the same dam.

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