In making 256 book a machine take 4 min. How many time it will take in making 564 book?
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256 books in 4min
Convert min into sec
4min=4*60sec=240sec
Then
One book time=256/240=10.66sec
Then
564books*10.66=6012.24 sec
Convert into min
6012.24/60=100.20 sec approx
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