A can do a work in 15 days and B in 9 days. If they work on it together for 5 days, then what fraction of work is left?1). $\frac{1}{6}$2). $\frac{3}{7}$3). $\frac{1}{3}$4). $\frac{1}{9}$
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1. If 3 workers collect 48 kg of cotton in 4 days, how many kg of cotton will 9 workers collect in 2 days?
2. A man can do a job in 10 days. His father takes 15 days and his son finishes it in 20 days. How long will they take to complete the job if they all work together?
3. A and B together can do a piece of work in 6 days and A alone can do it in 9 days. In how many days can B alone can do it?
4. A and B together can complete a particular task in 4 days.If A alone can complete the same task in 6 days, how many days will B take to complete the task if he works alone ?
5. 39 men can repair a road in 12 days working 5 hours a day. In how many days will 30 men working 6 hours peer day complete the work?
6. 18 men can complete a project in 30 days and 16 women can complete the same project in 36 days. 15 men start working and after 9 days they are replaced by 18 women. In how many days will 18 women complete the remaining work ?
7. A and B together can complete a piece of work in 8 days while B and C together can do it in 12 days. All the three together can complete the work in 6 days. In how much time will A and C together comp
8. Ravi does half as much work as Rahim in four-fifth of the time. If together they take 40 days to complete the work, how much time shall Ravi take to do it?
9. X completes a job in 2 days and Y completes it in 3 days and Z takes 4 days to complete it. If they work together and get Rs. 3900 for the job, then how much amount does Y get?
10. A and B can together finish work in 30 days. They worked at it for 20 days and then B left. The remaining work was done by A alone in 20 more daysA alone can finish the work in
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