A can do a piece of work in 25 days and B can finish it in 20 days. They work together for five days and then A goes away. In how many days will B finish the remaining work.
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9
A's 1 day's work = 1/25
Similarly, B's 1 day's work = 1/20
A's and B's together 1 day's work
=> 1/25 + 1/20 = 4/100 + 5/100 4+5/100
= 9/100
Their 5 day's work together = 5 x 1 day's work
1 - 45/100 = 100/100 - 45/100=100-45/100
= 55/100
Now, this remaining work is done by B.
Now, this remaining work is done by B.Let B takes x days to complete it.
1/20 * x = 55/100
=> x = 55/100*20
=> x = 55/5
=> x = 11 (ans)
Hence, B will finish the remaining work in 11 days.
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2
11 days
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