Mathematics
Medium
Question
Two pipes can fill a tank in 10 hrs. and 12 hrs. respectively while a third pipe empties the full tank in 20 hrs. If all the three pipes operate together , in how much time the tank will be filled ?
A
7.5 hrs
✓ Official correct answer
B
5 hrs
C
7 hrs
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
7.5 hrs
No member explanations yet for this option.
B
5 hrs
No member explanations yet for this option.
C
7 hrs
No member explanations yet for this option.
D
None of these
No member explanations yet for this option.