RRB NTPC · Question 39

'A' can do a work in 20 days and 'B' can do the same work in 15 days. 'B' works for 6 days and leaves work. In how many days can 'A' alone complete the remaining work? A. 12 days B. 4 days C. 6 days D. 5 days

1. A

   C

2. B

   D

3. C

   B

4. D

   A