Time and Work – Multiple Choice Questions (MCQs)

37. A can complete a piece of work in 18 days. B is 50% more efficient than A. How many days will B take to complete the same work?
- A. 12 days
- B. 9 days
- C. 6 days
- D. 15 days
38. P and Q can do a piece of work in 30 days. Q and R can do the same work in 24 days and R and P can do it in 20 days. How many days will R take to complete the work alone?
- A. 10 days
- B. 20 days
- C. 30 days
- D. 40 days
39. If 12 men and 18 boys can do a piece of work in 10 days while 3 men and 18 boys can do the same work in 12 days, then the ratio of the efficiency of a man to that of a boy is:
- A. 1:2
- B. 2:1
- C. 3:1
- D. 3:2
40. A, B, and C can complete a piece of work in 24, 6, and 12 days respectively. Working together, they can complete the same work in:
- A. 1/24 days
- B. 7/24 days
- C. 24/7 days
- D. 24 days
41. A water tank can be filled by pipe A in 5 hours and by pipe B in 4 hours. A third pipe C can empty it in 10 hours. If all three pipes are opened together, how long will it take to fill the tank?
- A. 20/7 hours
- B. 40/9 hours
- C. 20/9 hours
- D. 40/7 hours
42. A man, a woman, and a boy can complete a job in 3, 4, and 12 days respectively. How many boys must assist 1 man and 1 woman to complete the job in 1/4 of a day?
- A. 1
- B. 4
- C. 19
- D. 41
43. A does half as much work as B in three-fourths of the time. If together they can complete the work in 18 days, how much time shall B take to do it alone?
- A. 30 days
- B. 35 days
- C. 40 days
- D. 45 days
44. Two workers A and B are engaged to do a piece of work. A alone can complete the work in 12 days and B alone can complete it in 15 days. They work together for 4 days, and then A leaves. In how many more days will B finish the remaining work?
- A. 5 days
- B. 6 days
- C. 8 days
- D. 10 days
45. If 10 workers can build a wall in 12 hours, how many workers will be required to build the same wall in 8 hours?
- A. 15 workers
- B. 18 workers
- C. 20 workers
- D. 24 workers
46. A and B can do a piece of work in 8 days, B and C in 12 days, and A and C in 16 days. In how many days can A, B, and C together complete the work?
- A. 3 9/13 days
- B. 5 5/13 days
- C. 7 3/13 days
- D. 10 days
47. A tank has two pipes. The first pipe can fill it in 4 hours and the second can empty it in 16 hours. If both pipes are opened simultaneously, the tank will be filled in:
- A. 5 1/3 hours
- B. 6 hours
- C. 8 hours
- D. 10 hours
48. P can complete a work in 15 days and Q in 20 days. If they work together for 4 days, then the fraction of work that is left is:
- A. 8/15
- B. 7/15
- C. 1/5
- D. 2/5

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AllInfoHub – MCQ Practice

Time and Work – Multiple Choice Questions (MCQs)

37. A can complete a piece of work in 18 days. B is 50% more efficient than A. How many days will B take to complete the same work?

38. P and Q can do a piece of work in 30 days. Q and R can do the same work in 24 days and R and P can do it in 20 days. How many days will R take to complete the work alone?

39. If 12 men and 18 boys can do a piece of work in 10 days while 3 men and 18 boys can do the same work in 12 days, then the ratio of the efficiency of a man to that of a boy is:

40. A, B, and C can complete a piece of work in 24, 6, and 12 days respectively. Working together, they can complete the same work in:

41. A water tank can be filled by pipe A in 5 hours and by pipe B in 4 hours. A third pipe C can empty it in 10 hours. If all three pipes are opened together, how long will it take to fill the tank?

42. A man, a woman, and a boy can complete a job in 3, 4, and 12 days respectively. How many boys must assist 1 man and 1 woman to complete the job in 1/4 of a day?

43. A does half as much work as B in three-fourths of the time. If together they can complete the work in 18 days, how much time shall B take to do it alone?

44. Two workers A and B are engaged to do a piece of work. A alone can complete the work in 12 days and B alone can complete it in 15 days. They work together for 4 days, and then A leaves. In how many more days will B finish the remaining work?

45. If 10 workers can build a wall in 12 hours, how many workers will be required to build the same wall in 8 hours?

46. A and B can do a piece of work in 8 days, B and C in 12 days, and A and C in 16 days. In how many days can A, B, and C together complete the work?

47. A tank has two pipes. The first pipe can fill it in 4 hours and the second can empty it in 16 hours. If both pipes are opened simultaneously, the tank will be filled in:

48. P can complete a work in 15 days and Q in 20 days. If they work together for 4 days, then the fraction of work that is left is:

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