A, B and C gets a total wage of Rs.3600 if they work together. A and B gets a total wage of Rs. 2800 if they work together and A alone gets Rs.1600. Find the efficiency ratio of A, B and C  

P can complete a piece of work in thrice the time taken to complete Q and R together. If P and Q together can complete the work in 9 3/5 days and R alone complete in 16 days, then find the no of days taken to complete the work by P alone?

A can do a work in 20 days and B in 50 days. If they work on it together for 5 days, then what fraction of work is left?

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?

The rates of working of A and B are in the ratio of 2 : 3. The number of days taken by each of them to finish the work is in the ratio : 

X can do a piece of work in 24 days. When he had worked for 4 days, Y joined him. If complete work was finished in 16 days, Y can alone finish that work in :

A wall of 100 metres can be built by 7 men or 10 women in 10 days. How many days will 14 men and 20 women take to build a wall of 600 metres 

A sum of money is sufficient to pay A’ s wages for 21 days and B’s wages for 28 days. The same money is sufficient to pay the wages of both for: