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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 hoursC. 7 hours D. 7 1/2 hours
A tap can fill a tank in 6 hours. After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely? A. 3 hrs 15 minB. 3 hrs 45 min C. 4 hrs D. 4 hrs 15 min
A large tanker can be filled by two pipes A and B in 60 minutes and 40 minutes respectively. How many minutes will it take to fill the tanker from empty state if B is used for half the time and A and B fill it together for the other half? A. 15 min B….
One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill the tank in 36 minutes, then the slower pipe alone will be able to fill the tank in: A. 81 min. B. 108 min.C. 144 min. D. 192 min.
A cistern is normally filled in 8 hours but takes two hours longer to fill because of a leak in its bottom. If the cistern is full the leak will empty it in. A. 16 hrs B. 20 hrs C. 25 hrsD. 40 hrs Work done by leak in 1 hour = (1/8 – 1/10)…
One top can fill a cistern in 2 hours and another can empty the cistern in 3 hours. How long will they take to fill the cistern if both the taps are opened? A. 5 HoursB. 6 Hours C. 7 Hours D. 8 Hours Explanation: Net filling in 1 hour = (1/2 – 1/3) =…
A top can fill a cistern in 8 hours and another can empty it in 16 hours. If both the taps are opened simultaneously the time (in hours) to fill the tank is A. 8 B. 10C. 16 D. 24 Explanation: Part filled by insert in 1 hour = 1/8 Part emptied by outlet in…
Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours. C is closed A and B can fill the remaining par in 7 hours. The number of hours taken by C alone to fill the tank is? A. 10 B. 12C. 14 D. 16…
Two pipes A and B can fill a cistern in 37 1/2 minutes and 45 minutes respectively. Both pipes are opened. The cistern will be filled in just half an hour, if the pipe B is turned off after? A. 5 minB. 9 min C. 10 min D. 15 min Explanation: Let B be turned…
Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity of the tank is? A. 60 gallons B. 100 gallonsC. 120 gallons D. 180 gallons Explanation: Work done…