Q1. A and B could do a piece of work in 12 days and 20 days respectively. Find the number of days taken by them to complete 2/3rd of the work together. (in days)
Q2. A work is completed by P and Q together in 30 days. When a third person R joined them, then the work is completed in 18 days. In how many days, the work is completed by R alone? (in days)
Q3. The pipe A could fill a tank in 24 hours and the ratio of efficiency of A to B is 2:3. Find the total time taken by both of them together to fill half quantity of the tank completely. (in hours)
Q4. A tank is normally filled in 30 hours but due to a leak in it, it takes 6 hours more to be filled. If the tank is completely filled, then the leak will empty it in? (in hours)
Q5. Anil & Bhuvan can do a work in 18 days when working together while Bhuvan alone does it in 30 days. In what time the work will be finished if each Anil & Bhuvan completes half of the work? (in days)
Q6. If pipe A alone and pipe B alone can fill a tank in 40 min and 60 min respectively and pipe C alone can empty it in 20 min. If the tank is completely filled, then find the time taken to empty the tank if all the three pipes are opened simultaneously?
(a) 120 min
(b) 80 min
(c) 100 min
(d) 60 min
(e) 40 min
Q7. A can complete a work in 30 days while B can complete the same work in 24 days. With the help of C, the work is completed in 12 days. In how many days can C alone complete the work? (in days)
Q8. P and Q could do a piece of work in 10 days and 12 days respectively. If P, Q and R could do that same work in 4 days, then find the number of days taken by P and R working together to finish the same work? (in days)
Q9. There are two filling pipes X and Y, if X fills the tank in 20 hours and Y is 300% more efficient than X, then find the time taken by both pipes to completely fill the tank? (in hours)
Q10. Anshu completes 25% of work in 5 days but due to lack of time, Himanshu joins Anshu and they together complete the remaining work in 3 days. Find the number of days Himanshu would take to complete the same work alone? (in days)
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