A and B can do a job together in 7 days. A is 1 ¾ times as efficient as B. the same job can be done by A alone in:

 A and B can do a job together in 7 days. A is 1 ¾ times as efficient as B. the same job can be done by A alone in:

A). 10 days

B). 11 days

C). 12 days

D). 13 days

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Other Questions

1. A certain number of men can do a work in 60 days. If there were eight more men, it could be completed in 10 days less . How many men were there in the beginning?

2. Nikhil is thrice as efficient as Kanak and can finish an assignment in 6 days less than Kanak. How many days Kanak will take to finish the same assignment?

3. Two labourers A and B are paid a total of Rs. 650 per day. If A is paid 160 percent of what is paid to B, how much (in Rs.) is B paid?

4. Two pipes A and B can fill a tank in 36 hours and 45 hours respectively. If both the pipes are opened simultaneously, how much time will be taken to fill the tank?

5.  If A can complete a job in 10 days and along with B he can complete the same job in 6 days, how much of the job remain to be completed if both work for 4 days and A alone works for two more days ?

6. Rancho is 50% more efficient than Sundar. Rancho does a work in 4 days. In how many days will Rancho and Sundar finish a work if first day Rancho works alone, second day Sundar works alone and after that they work together?

7. 4 men can build a small house in 12 days. How long would it take for 6 men to build the same house?

8. Consider three pipes P, Q and R. The pipes P and Q can fill the cistern in 2 and 2.5 hours respectively. The pipe R can empty the cistern in 1 hour. If these pipes were opened at an interval of half an hour at 6:00am, 6:30am and 7:00am respectively. When the cistern will get empty?

9. B would have taken 10 hours more than what A would have taken to complete a task if each of them worked alone. Working together they can complete the task in 12 hours. How many hours would B take to do 50% of the task?

10. Three people P, Q and R have been assigned a work. P and Q can complete a work in 15 days and Q and R can complete a work in 18 days and all of them can complete the whole work in 12 days, then find the number of days in which P and R alone can do the whole work?