Answer-X and Y can complete a certain work in 45 days and 60 days, respectively. They started the work toge...

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LCM of 45 and 60  180total work Efficiency of X  18045  4 unitsday Efficiency of Y  18060  3 unitsday Effective efficiency  4  3  7 Let X left after a day, So, a x 7  39 x 3  180 7a117  180 7a 180-117   7a  63   a  9 So, after 9 days X left. X worked for 9 days.

X and Y can complete a certain work in 45 days and 60 days, respectively. They started the work together but X left after some days and Y alone completed the remaining work in 39 days. For how many days did X work?

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