Mathematics
Medium
Question
Three taps A, B and C can fill a tank in 12, 15 and 20 hours respectively. If A is open all the time and B and C are open for one hour each alternately, the tank will be full is_______?
A
6 hrs
B
6 2/3 hrs
C
7 hrs
✓ Official correct answer
D
7 1/2 hrs
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
6 hrs
No member explanations yet for this option.
B
6 2/3 hrs
No member explanations yet for this option.
C
7 hrs
No member explanations yet for this option.
D
7 1/2 hrs
No member explanations yet for this option.