If A needs 15 days to complete a work and B needs 20 days to complete same work , if they worked together for 4 days and left work how much work is incomplete?
A) 1/4
B) 2/9
C) 7/15
D) 8/15
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1
Answer:
D) 8/15
Step-by-step explanation:
In 4- days both can do=(7/60) x 4 =7/15 the work. The portion of work left unfinished = (1–7 /15)= 8/15.
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