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Question

A can do a piece of work in 25 days and B in 20 days. They work together for 5 days and then A goes away. In how many days will B finish the remaining work?
  1. 17 days
  2. 11 days
  3. 10 days
  4. None of these

A
11 days
B
17 days
C
10 days
D
None of these
Solution
Verified by Toppr

A's 1 day's work =125
Similarly, B's 1 day's work =120
A's and B's together 1 day's work
125+120=4100+5100=4+5100=9100
Their 5 day's work together = 5 x 1 day's work
145100=10010045100=10045100=55100
Now, this remaining work is done by B.
Let B takes x days to complete it.
120×x=55100x=55100×20x=555x=11
Hence, B will finish the remaining work in 11 days.

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