Mathematics
Medium
Question
P and Q need 8 days to complete a work. Q and R need 12 days to complete the same work. But P, Q and R together can finish it in 6 days. How many days will be needed if P and R together do it?
A
7
B
8
✓ Official correct answer
C
9
D
10
Community credibility
Registered members can vote for the answer they believe is correct today and explain why. If the facts change after an election or news event, suggest a new option so others can vote it up.
A
7
No member explanations yet for this option.
B
8
No member explanations yet for this option.
C
9
No member explanations yet for this option.
D
10
No member explanations yet for this option.