A and B can separately complete a piece of work in 20 days and 30 days respectively. They worked together for some time, then B left the work. If A completed the rest of the work in 10 days, then B worked for? (a) 6 days (b) 8 days (c) 12 days (d) 16 days (e) None of these
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Answer:
A) 6 days
Step-by-step explanation:
A's 10 days work = 10×310×3 units/ days = 30 units
So,(60−30)=30(60−30)=30 units of work would have been done by A
and B both and it took time:
30(3+2)=6days30(3+2)=6days
So, B worked for 6 days