A can complete a work in 6 days, and B can complete it in 12 days. C takes the same time as A and B working together. How long will B and C take to complete the work together?
A
8 days
B
3 days
C
4 days
D
None of these
Correct Option:
B
Explanation
A's rate is 1/6 of the work per day and B's rate is 1/12. Together, A and B work at 1/4 per day, so C's rate is also 1/4. Therefore, B and C work at 1/3 per day and complete the work in 3 days.
