Pipe A can fill a tank in 10 hours and pipe B can empty it in 15 hours. In how many hours will the tank be filled if both the pipes are opened?

  1. Home
  2. Back

Question:
Pipe A can fill a tank in 10 hours and pipe B can empty it in 15 hours. In how many hours will the tank be filled if both the pipes are opened?

1.6

2.10

3.20

4.30

Posted Date:-2021-09-20 02:50:13

More MCQS Questions and answers

  1. 12 women or 16 girls can do a certain job in 20 days. 14 women and 8 girls can do the same job in how many days?
  2. 16 men can finish two fifth of the work in 4 days. The number of additional men required to finish the remaining work in 2 more days will be
  3. 20 men can do a certain work in 60 days but after every five days five additional men join them. In how many days will work be done now?
  4. 20 men or 30 boys can do a certain job in 20 days. How long will it take 6 men and 15 boys to do the same job?
  5. 30 men can do a certain work in 15 days. They started working on the project but 5 of them leave after every five days. In how many days will the work be completed now?
  6. A and B can complete a task in 44 days when working together. After having worked together for 33 days B is called away. A completes the remaining task in the next 25 days. A can complete the job working alone in
  7. A and B can do a piece of work in 10 days. B and C in 15 days C and A in 30 days. In how many days can they do it all working together?
  8. A and B together can fill a ditch in 30 days while A alone can fill it in 50 days. If B does the work for only half a day daily how long will it take to fill the ditch by A and B?
  9. A can complete a piece of work in 16 days and B can complete it in 20 days. They start working together. Two days before the completion of the work A leaves. Work is completed in
  10. A can do a piece of work in 10 days and B in 15 days. If they work for a day alternately A beginning the work will be completed in
  11. A can do a piece of work in 16 days while B can do it in 12 days. With the help of C they can finish it in 6 days. In how many days can C alone do the work?
  12. A can do a piece of work in 28 days. If B is 40% more efficient than A B can do the same piece of work in
  13. A can do a work in 40 days and B can do it is 25 days. A worked at it for 8 days. In how many days B can finish the remaining work.
  14. A can finish a work in 20 days B can do the same work in 10 days. After A has worked for 5 days B joins A in how many days the remaining work will be finished.
  15. A can finish a work in 24 days B can finish the same work in 36 days. If they work together and finish it then out of total wages of Rs. 500 A will get
  16. A can finish a work in 7 days B in 14 days and C in 28 days. B and C start working and are forced to leave the work after 2 days. The number of days taken by A to finish the remaining work is
  17. A can type 60 pages in 15 hours. A and B can type 150 pages in 25 hours. How long will it take B alone to type 120 pages?
  18. A certain number of men could complete work in 40 days. If there were 20 men more the work could be completed in 20 days. The original number of men is
  19. A is thrice as good workman as B and together they finish a piece of work in 24 days. In how many days can A alone finish the work
  20. A is twice as good a workman as B and takes 6 less days to complete a piece of work as B does. To finish the work alone B will take
  21. A painter charges Rs. 120 per hour and his son charges half of his charges. One day the son worked 2 hours more than father and thus they collectively earned Rs. 480. The time consumed by the son is:
  22. A tank can be filled by tap A in 16 hrs and by tap B in 20 hrs. Both the taps are kept opened for 8 hrs and then A is closed. In how many more hours will the tank be completely filled?
  23. A tank has a leak which would empty it in 10 hrs. A tap is turned on and it admits 9 liters per minute into the tank and tank is now emptied in 25 hrs. How many liters tank holds?
  24. A tank that can be filled by an inlet pipe A in 12 hours is filled in 18 hours while out let pipe B is opened. The outlet pipe B can empty the full tank in
  25. A tank which has a leak in the bottom is filled in 20 hours. Had there been no leak the tank would have been filled in 15 hours. The leak can empty the full tank in
  26. A works thrice as fast as B. If B can complete a work in 18 days. Then number of days taken by A and B working together to complete this work is
  27. During a certain week a post office sold $280 worth of 14 cents stamps. How many of these stamps did they sell?
  28. For a certain job Ahmed charges $ 12 an hour while Sana charges $6 an hour. If both worked the same amount of time together on a job how many hours did each of them work if their combined charges were $144?
  29. If 4 times x is equal to x increased by 2 then x=
  30. If a man earns $ 200 for for his first 40 hours of work and is paid 3/2 times his regular hourly rate for every additional hour. How many hours must he work to make $300 in a week?
  31. If the sum of x y and z is twice the sum of x minus y and x minus z then x=?
  32. If three times x is equal to x decreased by y and y is three less than x then value of x is:
  33. In a class there are 27 students. If there are 7 more girls than boys in the class how many students are girls?
  34. In a Math test there were 60 problems which were to be done in 1 hour. A student completes 30 problems in 20 minutes how many seconds does he have as average for completing each of the remaining problems.
  35. Jawads weekly salary is $70 less then Pashas which is $50 more than Marias. If Maria earns $280 per week how much does Jawad earn per week?
  36. Lilly took 5q pensils from a shop. If she gave q pencils to each of her 2 brothers. How many pencils will she have now?
  37. M and N working separately can complete a job in 6 and 12 hours respectively. If they work for an hour alternately M starting at 10:00 AM when will the job be done?
  38. Madiha is n years old. Samee is 6 years younger than Madiha and 2 years older than Javid. What is the sum of the ages of all the three?
  39. Nosheen painted 1/3 of her room with 5/2 cans of paint. How many more cans of paint will she need to finish painting her room?
  40. On a map a distance of 100 cm represents 5km. If a street is 750 m long what is its length in the map in cm?
  41. Pipe A can fill a tank in 10 hours and pipe B can empty it in 15 hours. In how many hours will the tank be filled if both the pipes are opened?
  42. Sana has 100 dollars more than Reeha. After Sana spends 20 dollars on groceries she has 5 times as much money as Reeha has. How much money does Reeha has?
  43. The average of 5 numbers is 13. If the average of 4 of these numbers is 10 what is the fifth number?
  44. The product of 3 and n is equal to 2 less than m. Which of the following is true?
  45. The product of 3 and x is equal to the difference of 2x and y decreased by 2. Which of the following is true under the above conditions?
  46. Three pipes A B and C can fill a tank in 20 hours. After working at it together for 5 hours C is closed and A and B fill it in 30 hrs. C alone can fill it in
  47. Two pipes A and B can fill a tank in 14 and 21 hrs respectively. If both pipes are opened together then after how many hours A should be closed so that tank is full in 7 hours.
  48. Two pipes can fill an empty tank in 10 and 15 hrs respectively. If waste pipe C is opened both A and B together can fill the tank in 5 hours. The waste pipe can empty the full tank in
  49. Working 8 hours a day a work is done in 10 days. For how many hours a day must the work be done in order to complete it in 8 days.
Search
R4R Team
R4Rin Top Tutorials are Core Java,Hibernate ,Spring,Sturts.The content on R4R.in website is done by expert team not only with the help of books but along with the strong professional knowledge in all context like coding,designing, marketing,etc!