5 masons can make a building in 28 days. In how many can 7 masons build it?
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Answer:
5 masons can make a building in 28 days
1 masons can make a building in =(28*5) days
7 masons can make a building in=( 28 *5)/7days
=20 days
Hence 7 masons can make a building in 20 days
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