Time and Work in Aptitude MCQ Quiz (Multiple Choice Questions And Answers)
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51. If 5 men and 2 boys working together, can do four times as much work per hour as a man and a boy together. Find the ratio of the work done by a man and that of a boy for a given time?
- ratio 1:2
- ratio 3:4
- ratio 4:3
- ratio 2:1
52. 30 men can do a work in 40 days. When should 20 men leave the work so that the entire work is completed in 40 days after they leave the work?
- 20
- 10
- 40
- 5
53. A can do a work in 9 days and B can do the same work in 18 days. If they work together, in how many days will they complete the work?
- 3
- 12
- 18
- 6
54. A, B and C can do a work in 90, 30 and 45 days respectively. If they work together, in how many days will they complete the work?
- 14
- 21
- 15
- 30
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