time and work MCQs – Page 3

Practise focused time and work questions with marked answers for exam preparation and subject revision.

time and work Mcqs

41. wo pipes X and Y fill a tank in 15 hrs. and 20 hrs. respectively, while a third pipe Z can empty the full tank in 25 hrs. All the three pipes are opened in the beginning. After 10 hrs. Z is closed. In how much time, will the tank be full ?
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A. 12 hrs

B. 14 hrs

C. 18 hrs

D. 16 hrs

42. Machine P can print one lakh books in 8 hours. Machine Q can print the same number of books in 10 hours while machine R can print the same in 12 hours. All the machines started printing at 9 A.M. Machine P is stopped at 11 A.M. and the remaining two machines complete work. Approximately at what time will the printing of one lakh books be completed?
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A. 2:00 PM

B. 11:00 AM

C. 3:00 PM

D. 1:00 pm

43. Two pipes P and Q can fill a cistern in 12 minutes and 16 minutes respectively. Simultaneously both the pipes are opened together, then after how much time Q should be closed so that the tank is full in 9 min ?
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A. 3 min

B. 2 min

C. 5 min

D. 4 min

44. P can do a work in 24 days. Q can do the same work in 9 days and R can do the same in 12 days. Q and R start the work and leave after 3 days. P finishes the remaining work in_________days.
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A. 12

B. 11

C. 10

D. 9

45. A and B can finish a piece of work in 20 days .B and C in 30 days and C and A in 40 days. In how many days will A alone finish the job?
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A. 34(2/7)

B. 45

C. 48

D. 44

46. P takes twice as much time as Q or thrice as much time as R to finish a piece of work. They can finish the work in 2 days if work together. How much time will Q take to do the work alone?
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A. = 2

B. 7

C. 8

D. t; Q takes 12/2 days = 6 days to complete the work

E. 9

F. t; x = 12

47. A and B together can complete a work in 1.2 days,. A alone can complete it in 20 days. If B does the work only for half a day daily, then in how many days A and B together will complete the work ?
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A. 11 days

B. 10 days

C. 15 days

D. 20 days

48. C takes 6 days to complete half of a work and D takes 5 days to complete 1/3rd of the same work. They take turns to complete the task. If C works for the first 4 days, in how many days will D complete the rest of the work without the help of C?
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A. 9 days

B. 8 days

C. 10 days

D. 12 days

49. A and B can do a piece of work in 12 days; B and C in 15 days; C and A in 20 days. A alone can do the work in__________?
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A. none of these

B. 20 days

C. 40 days

D. 30 days

50. If 6 men take 9 days to complete a work, how many men can complete the work in 3 days?
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A. 2 men

B. 9 men

C. 18 men

D. 12 men

51. A and B can do a piece of work in 21 and 24 days respectively.They start the work together and after some days, A leaves and B completes the rest of the task in 9 days. After how many days did A leave?
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A. 7

B. 6

C. 8

D. 5

52. P and Q can complete a work in 20 days and 12 days respectively. P alone started the work and Q joined him after 4 days till the completion of the work. How long did the work last?
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A. 5 days

B. 15 days

C. 12 days

D. 10 days

53. To fill a cistern, pipes P, Q & R take 20, 15 & 12 minutes respectively. The time in minutes that the three pipes together will take to fill the cistern is:__________?
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A. 15 min

B. 20 min

C. 5 min

D. 10 min

54. 6 men and 8 women can complete a work in 10 days. 26 men and 48 women can finish the same work in 2 days. 15 men and 20 women can do the same work in_______days.
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A. 4 days

B. 8 days

C. 2 days

D. 6 days

55. A alone can finish a work in X days. B alone can finish the same work in X+5 days. Together, they take 6 days to complete the work. Find X
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A. 10

B. 12

C. 8

D. 9

56. A and B can finish a work 30 days if they work together. They worked together for 20 days and then B left. A finished the remaining work in another 20 days. In how many days A alone can finish the work?
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A. 50

B. 40

C. 70

D. 60

57. 8 men can dig a pit in 20 days. If a man works half as much again as a boy, then 4 men and 9 boys can dig a similar pit in:__________?
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A. 20 days

B. 18 days

C. 12 days

D. 16 days

58. Farjan and Kashif can complete a task in 30 days. Farjan leaves after 20 days and Kashif alone completes it in another 25 days. How many days does Farjan alone take to complete the entire task?
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A. 60

B. 75

C. 45

D. 50

59. A can do a certain work-in the same time in which B and C together can do it. If A and B together could do it in 10 days and C alone in 50 days, then B alone could do it in_________?
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A. 30 days

B. 15 days

C. 20 days

D. 25 days

60. Kamal will complete work in 20 days. If Suresh is 25% more efficient than Kamal, he can complete the work in________days.
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A. 14

B. 16

C. 15

D. 11

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