K and L can do a work in 15 and 20 days respectively. They work together for 5 days and leave. Calculate the unfinished portion of the work.

K and L can do a work in 15 and 20 days respectively. They work togeth

1.	K and L can do a work in 15 and 20 days respectively. They work together for 5 days and leave. Calculate the unfinished portion of the work.
A.	7/12
B.	5/12
C.	1/13
D.	1/4
Answer» C. 1/13

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K and L can do a work in 15 and 20 days respectively. They work together for 5 days and leave. Calculate the unfinished portion of the work.

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