Quantitative Apitute-Time & Work
Quantitative Apitute-Time & Work
21. A can do a piece of work in 6 days and B alone can do it in 8 days A and B undertook to do it of Rs.640. With the help of C, they finished it in 3 days. How much is paid to C ?
- Rs. 75
- Rs 80
- Rs. 120
- Rs. 160
22. A, B anc C together earn Rs. 300 per day, while A anc C together earn Rs. 188 and B and C together earn Rs. 152. the daily earning of C is:
- Rs. 150
- Rs. 112
- Rs. 68
- Rs. 40
23. A certain number of men complete a piece of work in 60 days. If there were 8 men more, the work could be finished in 10 days less. Hoe maany men were originally there ?
- 30
- 32
- 36
- 40
24. The rates of working of A and B are in the ratio 5 : 6 The number of days taken by them to finish the work are in the ratio :
- 5 : 6
- 25 : 36
- 6 : 5
- None of these
25. If 1 man or 2 women or 3 boys ca do a piece of work in 44 days, then the same piece of work will be done by 1 man, 1 woman and 1 boy in :
- 21 days
- 24 days
- 26 days
- 33 days
26. 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 cn dig a similar pit in :
- 10 days
- 12 days
- 15 days
- 16 days
27. A and B can separately do a piece of work in 20 and 15 days respectively. they worked to together fof 6 days, after whch B was replaced by C. If the work was finished in next 4 days, then the number of days in which C alone could do the work will be :
- 60
- 40
- 35
- 30
28. A, B and C can do a piece of work in 36, 54 and 72 days respectively. they started the work but A left 8 days befire the completion of the work while B left 12 days before the completion. The number of days for which C worked is :
- 4
- 8
- 12
- 24
29. Two taps A and B can fill tank in 10 hours and 15 hours respectively if both the taps are opened together, the tank will be full in :
- 5 hrs
- 6 hrs
- 12 1/2 hrs
- 7 1/2 hrs
30. To fill a cistern pipes A, B and C take 20 minutes, 15 minutes and 12 minutes respectively. The time in minutes that the three pipes together will together wil take to fill the cistern, is :
- 7 hrs
- 8 hrs
- 7 hrs30 min
- 8 hrs 30 min