8 boys complete a work in 14 days . In how many days will 14 boys complete that work?
A). 14 days
B). 7 days
C).
8 days
D). 6 days
1 boy 1 day work = 14 × 8, 14 boys complete the work in 14 × 8/14= 8 days
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1. Two pipes P and Q can fill the tank alone in 60 and 90 hours respectively. If they are opened together, then in how many hours will the tank be filled?
2. A can do a piece of work in ‘x’ days and B can do the same work 3x days. To finish the work together they take 12 days. What is the value of ‘x’?
3. A tank can be filled by one tap in 6 hours and by another tap in 8 hours. How long will it take to fill the tank, if both the taps are opened together?
4. A cistern has a leak which would empty it in 8 hrs. A tap is turned on which admits 6 litres a minute into the cistern, and it is now emptied in 12 hours. How many litres does the cistern hold?
5. If 10 people can do a job in 20 days,then 20 people with twice the efficiency can do the same job in
6. A and B can do a work in 8 days, B and C can do the same work in 12 days. A, B and C together can finish it in 6 days. A and C together will do it in?
7. Two pipes, A and B can fill a tank in 16 and 20 hours respectively. If both are opened together and at the end of 4 hours pipe A is closed, How long will the pipe B take to fill the remaining part of the tank?
8. If 12 men or 20 women or 36 children can do a work in 12 months, then 5 men, 10 women and 15 children can do half of the work in
9. Jack and Finn can finish a work together in 6 hours, while Finn alone can do it in 10 hours. What is the ratio of efficiencies of Jack and Finn?
10. A and B can do a piece of work in 30 days while B and C can do the same work in 24 days and C and A in 20 days. They all work together for 10 days when B and C leave. How many days more will A take to finish the work ?
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