1. 20 men complete 1/3 of a piece of work in 20 days. How many more men should be employed to finish the rest of the work in 25 more days?
A. 10
B. 12
C. 15
D. 20
2. If a certain number of workmen can do a piece of work in 25 hours, in how many hours will another set of an equal number of men, do a piece of work, twice as great, supposing that 2 men of the first set can do as much work in an hour as 3 men of second set do in an hour?
A. 60
B. 75
C. 90
D. 105
3. 5 Men working 8 hours a day can completely build a wall of length 20 m, breadth 1/4 m and height 6 m in 3 days. How many days will 8 men working 6 hours a day require to build a wall of length 120m, breadth 1/2m and height 4m.
A. 10 days
B. 20 days
C. 21 days
D. 24 days
4. A ship can be unloaded in 20 days. A contractor appointed 280 persons. After 6 days only 1/4th of the work was done. Find the number of additional men required to finish the job on time.
A. 80 men
B. 90 men
C. 70 men
D. 75 men
5. 12 men & 18 boys, working7 a day, can do hours 2 a piece of work in 60 days. If a man work equal to 2 boys, then how many boys will be required to help 21 men to do twice the work in 50 days, working 9 hours a day?
A. 30
B. 42
C. 48
D. 90
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