Mathematics
Medium
Question
A and B can do a piece of work in 12 days; B and C in 15 days; C and A in 20 days. A alone can do the work in__________?
A
20 days
B
30 days
✓ Official correct answer
C
40 days
D
none of these
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
20 days
No member explanations yet for this option.
B
30 days
No member explanations yet for this option.
C
40 days
No member explanations yet for this option.
D
none of these
No member explanations yet for this option.