QBM051

Q1. A cistern is normally filled in 6 h but takes 4 h longer to fill because of a leak in its bottom. If the cistern is full, the leak will empty it in how much time? Q2. Two pipes A and B can fill a tank in 8 hours. If only pipe A is open, then it would take 4 hours longer to fill. Find how much longer would it take if only pipe B is open? Q3. Bob and Mose set off at the same time on a 30 km walk for charity. Bob walks 1.4 km/h faster than Moe, but stops for 20 min on route. Even with the delay, Bob finishes 2 hours ahead of Moe. How fast was each [erson walking, and how long did it take for each person to finish the walk? Q4. If A and B work together, they will complete a job in 7.5 days. However, if A works alone and completes half the job and then B takes over and completes the remaining half alone, they will be able to complete the job in 20 days. How long will B alone take to do the job if A is more efficient than B? (1)20 days (2)40 days (3)30 days (4)24 days Q5.A water tank has three outlet taps A, B and C. A fills 4 buckets in 24 min, B fills 8 buckets in 1 hr and C fills 2 buckets in 20 minutes. If all the tapes are opened together, a full tank is emptied in 2 hr. If a bucket contains 5 L of water, what is the capacity of tank? Q6. Ten pipes through which water flows at the same rate can fill a tank in 24 minutes. If two pipes go out of order, how long will the remaining pipes take to fill the tank? (a) 40 minutes (b) 45 minutes (c) 19-1/5 minutes (d) 30 minutes Q7. A certain number of men can do work in 60 days. If there were 8 men more it could be finished in 10 days less. How many men are there? Q8.The Buna dam has four inlets. Through the first three inlets, the dam can be filled in 12 minutes; through the second, the third and fourth inlet, it can be filled in 15 minutes; and through the first and the fourth inlet, 20 minutes. How much time will it take all the four inlets to fill up the dam? Q9. A can do a piece of work in 6 days, B in 8 days and C in 12 days , B & C together do the work for 2 days and then C is replaced by A. Find the total time required to finish the work? Q10. 15 men take 21 days of 8 hours each to do a piece of work. How many days of 6 hours each would 21 women take, if 3 women do as much work as 2 men? (a) 20 (b) 25 (c) 18 (d) 30 Q11. There are 12 pipes attached to a tank. Some of them are fill pipes and some are drain pipes. Each of the fill pipes can fill the tank in 12 hours, while each of the drain pipes will take 24 hours to drain a full tank completely. If all the pipes are kept open when the tank was empty, it takes 2 hours for the tank to overflow. How many of these pipes are drain pipes? (1)6 (2)11 (3)4 (4)7 Q12. Two guys were working on your car. One can complete the given job in six hours, but the new guy takes eight hours. They worked together for two hours, but then the first guy left to help another mechanic on a different job. How long will it take the new guy to finish your car? ANS: It takes the new guy another 3 hours and twenty minutes to finish fixing your car. Q13. A works twice as fast as B. if B can complete a piece of work independently in 12 days, S and B together can complete the work in: a)4 days b)6 days c)8 days d)18 days END