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X can complete the work in 10 days, Y can do the same in 15 days. If they are hired for 5 days to do the work together, what is the work that left unfinished?

Correct Answer: 1/6

Explanation:

Given X can do in 10 days 


=> 1 day work of X = 1/10


 


Y can do in 15 days 


=> 1 day work of Y = 1/15


 


1day work of (X + Y) = 1/10 + 1/15 = 1/6


 


Given they are hired for 5 days


 => 5 days work of (X + Y) = 5 x 1/6 = 5/6


 Therefore, Unfinished work = 1 - 5/6 = 1/6 


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