MUJ_QA_02

A water tank is two-fifth full.Pipe A can fill a tank in 10 minutes and pipe B can empty it in 6 minutes.If both the pipes are open,how long will it take to empty or fill the tank completely?

• 6 min.to empty

• 6 min.to fill

• 9 min.to empty

• 9 min.to fill

A pump can fill a tank with water in 2 hours. Because of a leak, it took 2 1/3 hours to fill the tank. The leak can drain all the water of the tank in:

• 7 hours

• 8 hours

• 12 hours

• 14 hours

A booster pump can be used for filling as well as for emptying a tank. The capacity of the tank is 2400 cubic meter . The emptying capacity of the tank is 10 cubic meter per minute higher than its filling capacity and the pump needs 8 minutes lesser to empty the tank than it needs to fill it. What is the filling capacity of the pump?

• 50 cubic meter per min

• 60 cubic meter per min

• 72 cubic meter per min

• 80 cubic meter per min

Pipes A and B can fill a tank in 10 hours and 40 hours, respectively. C is an outlet pipe attached to the tank. If all the three pipes are opened simultaneously, it takes 80 minutes more time than what A and B together take to fill the tank. A and B are kept opened for 7 hours and then closed and C was opened. C will now empty the tank in:

• 49.5 hours

• 39.2 hours

• 42 hours

• 49 hours

A sump is filled by three tankers with uniform flow. The first two tankers operating simultaneously fill the sump in the same time during which the sump is filled by the third tanker alone. The second tanker fills the sump 5 hours faster than the first tanker and 4 hours slower than the third tanker. The time required by the first tanker is:

• 16hours

• 9hours

• 10hours

• 15hours

A father can work at the same rate as that of his two sons working together. If one son can complete a job in 6 days and the other son can complete the same job in 12 days. Find the time taken by father to complete the job.

• 2

• 5

• 7

• 9

3 workers Peroola, Rahul and Prashant can complete a piece of work in 6 days. Peroola takes 15 days less than Rahul to complete the same work. Find in how many days will Prashant complete the whole work alone with 75% of his original efficiency, if Rahul can complete the work alone in 35 days?

• 560/37 days

• 499/36 days

• 361/17 days

• 555/43 days

Three workers Trump, Putin and Jinping are appointed to do a job. They together started the job but Jinping left after 3 days when 37% of the job was done. The remaining job was completed by Trump and Putin in 7 days. The ratio of efficiency of Trump and Putin is 4 : 5. Find the number of days required by the slowest worker to complete the entire job alone?

• 22 days

• 20 days

• 43 days

• 30 days

Raj can do a piece of work in 20 days and Rohan can do it in 12 days. On which date will they complete the work, if they work together on prime number dates starting on 29th April?

• 7th May

• 17th May

• 13th May

• 23rd May

To do a certain task Bhuvan would take 3 times as long as Abir and Varun together; and Varun would takes 4 times as long as Abir and Bhuvan together. Three of them together can complete the task in 5 days. How much time is taken by Bhuvan and varun to complete the task?

• 14 1/2 days

• 13 1/3 days

• 12 days

• 11 1/9 days