A and B working alone can do a work in 20 days and 15 days respectively. They started the work together but B left after sometime and A finished remaining work in 6 days. Find after how many days from start B left the work ?

1:

5 days

2:

4 days

3:

6 days

4:

3 days

5:

7 days

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SBI Clerk Prelims 2018

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