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 in_________?
A
6 hours
B
6 2/3 hours
C
7 hours
✓ Official correct answer
D
7 1/2 hours
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 hours
No member explanations yet for this option.
B
6 2/3 hours
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C
7 hours
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D
7 1/2 hours
No member explanations yet for this option.