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- Taps A and B can fill a bucket in 12 minutes and 15 minutes respectively.
Question 1:
Taps A and B can fill a bucket in 12 minutes and 15 minutes respectively. If both are opened and A is closed after 3 minutes,how much further time would it take for B to fill the bucket?
A. 8 min 15 sec
Feedback Part filled in 3 minutes = 3*(1/12+1/15)=3*9/60=9/20
Remaining part =1-9/20=11/20=>11/5:11/20=1:X=>X=11/20*15/1=>X=8.15mins
Remaining part =1-9/20=11/20=>11/5:11/20=1:X=>X=11/20*15/1=>X=8.15mins
B. 7 min 15 sec
C. 6 min 15 sec
D. 5 min 15 sec
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