Q11 Suhan can do a work in 12 days and Simran can do the same in 36 days. With Rahul they can do the job in 8 days. So, Rahul can do the job in :

Q12 P and Q can do a work in 18 days and 24 days respectively. They worked together for 8 days and then P left. The remaining work was finished by Q in

Q13 On a certain day, Ram works at 11/7th of his usual rate of doing work and finished the work 28 minutes earlier than the usual time required. Had Ram worked at 7/11th of his usual rate of doing work then the time taken by him to complete the work would have been how much more than the usual time required?

Q14 A can plough a farm in same time as B and C together can do it. If A and B together do the same in 20 days and C in 100 days then B could do it alone in:

Q15 A can complete a piece of work in 36 days, B in 54 days and C in 72 days. All the three began the work together but A left 8 days before the completion of the work and B 12 days before the completion of work. Only C worked up to the end. In how many days was the work completed?