A can do a piece of work in 30 days he works at it for 5 days and then B finish it in 20 days in what time can A and B do it together ?
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Answer:
A's 5 days work=5x/3o=1/6 Part
Balance=5/6
B in to days,B's 1 day work
5/6x20 /l=100/6
A. & B can finish
I/30+6 / loo
= 28 / 300 = 7/75
75/7=10 5/7 days
Step-by-step explanation:
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