Time and Work

26. A clock slows down one minute every 24 hours. How long will it take to slow down by one hour?

• ক. 24 days
• খ. 30 days
• গ. 60 days
• ঘ. 60 hours

27. If 18 identical machines required 40 days to complete a job, how many fewer days would have been required to do the job if 6 additional machines of the same type had been used from the beginning?

• ক. 10
• খ. 13.33
• গ. 16
• ঘ. 26.66

28. If Salam makes a box every 5 minutes and Kalam takes 7 minutes to make a box, what will be the ratio of the number of boxees produced by Salam to the number of boxes produced by Kalam if they work for 5 hours and 50 minutes?

• ক. 5 to 6
• খ. 5 to 7
• গ. 6 to 5
• ঘ. 7 to 5

29. Nazir can wash his car 15 minures while his son takes twice as long. If they work together how many minutes will the job take them?

• ক. 5
• খ. 12
• গ. 10
• ঘ. 20

30. If m men can do a job in 10 days, how many days it will take for 10 men to complete the job assuming that they work at the same rate?

• ক. m
• খ. 10/m
• গ. 100m
• ঘ. 10m

31. If it takes 50 workers 4 hours to dig a hole, how long should it take 30 workers to dig the same hole?

• ক. 5 hours 12 minutes
• খ. 6 hours 40 minutes
• গ. 2 hours 24 minutes
• ঘ. 6 hours 12 minutes

32. A typist can type 125 pages, 36 lines each, 11 words in each line in 5 days. How many pages of 30 lines each and 12 words to each line can he type in 6 days?

• ক. 170
• খ. 165
• গ. 180
• ঘ. 175

33. One worker can do a job in n hours, while it takes a second worker m hours to do the same job. How long does it take both workers?

• ক. (m + n)/mn
• খ. mn/(m + n)
• গ. m + n
• ঘ. 1/m + 1/n

34. If a woman is paid Tk.m per hour every hour she works up to 8 hours and is paid double for every hour she workes after 8 hours, how much Tk will she be paid for working 13 hours?

• ক. 6m
• খ. 8m
• গ. 13m
• ঘ. 18m

35. A contractor employs 60 person for doing a job in 80 days. After 20 days it was found that only one-fifth of work was finished.How many more persons are to be employed to finish the job as per schedule?

• ক. 20
• খ. 80
• গ. 60
• ঘ. 40

36. A, B and C started a job which they can complete in 2 days. B can do the job in 5 days and C can do it in 4 days. After working for 1 day, both B and C left. How long would it take A to complete the rest of the job?

• ক. 20 days
• খ. 30 days
• গ. 4 days
• ঘ. 10 days

37. Ram can do a job in 20 days while Sham can do the same job in 25 days. After working for 10 days together, Sham left and Ram finished the job. How many days did Ram take to finish the job?

• ক. 1
• খ. 2
• গ. 5
• ঘ. 4

38. Mr. Shahin moved 3/4 th of his lawn in 5/4 hours. Mr. Ashique makes twice as fast and finishes the remaining job. How many minutes did Mr. Ashique work?

• ক. 25
• খ. 38
• গ. 50
• ঘ. 25/2

39. Three pipes are used to fill a pool with water. Individually they can fill the pool in 9 hours, 6 hours and 3 hours. How many minutes will it take to fill the pool if three pipes are used simultaneously?

• ক. 54
• খ. 5.64
• গ. 98
• ঘ. 1.63

40. If 8 men can do a job in 12 days, what is the percentage increase in the number of days required to do the job when 2 men are released?

• ক. 33.33%
• খ. 20%
• গ. 4%
• ঘ. 25%

41. Worker W produces n units in 5 hours, workers W & V working independently but at same time produces n units in 2 hours. How long would it take V alone to produce n units?

• ক. 2 hours 20 minutes
• খ. 2 hours 30 minutes
• গ. 1 hour 25 minutes
• ঘ. 2 hours 40 minutes

42. A man and a boy can finish a job working together for 4 days. The man can work as much as two boys can do. Then in how many days can the man do it alone?

• ক. 12
• খ. 23
• গ. 6
• ঘ. 8

43. A man works twice as much as his assistant. The man can finish the job in 12 days. Find the number of days in which the man and his assistant can finish the job if they work together?

• ক. 12
• খ. 8
• গ. 6
• ঘ. 10

44. A man and a boy together can complete a job in 81 days. Two man and three boys together can complete the job in 36 days. In how many can 4 men working together complete the job?

• ক. 30
• খ. 36
• গ. 38
• ঘ. 21

45. If ‘x’ men can do a work in 8 days and ‘x + 4’ men can do it in 6 days, what is the value of ‘x’?

• ক. 4
• খ. 6
• গ. 8
• ঘ. 12

46. If 5 men and 9 women can do a pice of work in 19 days, then in how many days will 3 men and 6 women do the same work?

• ক. 12
• খ. 15
• গ. 18
• ঘ. 21

47. A, B and C can complete a pice of work in 24, 6 and 12 days respectively. Working together, they will be complete the same work in:

• ক. 1/24 days
• খ. 7/24 days
• গ. 24/7 days
• ঘ. 4 days

48. Some persons can do a pice of work in 12 days. Two times the number of such persons will do half of that work in:

• ক. 6 days
• খ. 4 days
• গ. 3 days
• ঘ. 12 days