Mathematics
Medium
Question
A completes 80% of a work in 20 days. Then B also joins and A and B together finish the remaining work in 3 days. How long does it need for B if he alone completes the work?
A
37 ½ days
✓ Official correct answer
B
22 days
C
31 days
D
22 days
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
37 ½ days
No member explanations yet for this option.
B
22 days
No member explanations yet for this option.
C
31 days
No member explanations yet for this option.
D
22 days
No member explanations yet for this option.