A and B togather finish a piece of work in 30days. They work together for 20days and then A left.After 20days,B finished the remaining work. In how many days B alone can finish the piece of work?
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A=20 days
B= 30 days ....
lcm of 20 and 30is 60
A'sper day work = 60/20= 3 units
B's per day work = 60/30= 2 units
A+B per day work ... = 5 units
priyanka961:
sry this answer is posted by mistake...
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