36 people working 8 hours a day can do 3 units of work in 12 days. How many persons are required to do 5 units of that work in 16 days. If they work for 6 hours a day?

Working 8 hours a day, Sohan writes a book in 18 days. How many hours per day should he write to write the entire book in 12 days?

Sanjay and Jacob start running in opposite directions from the same point at speeds of 7m/s and 5m/s. After 42 minutes, how far would they be from each other?

A can complete a piece of work in 18 days, B in 20 days and C in 30 days. B and C together start the work and are forced to leave after 2 days. The time taken by A alone to complete the remaining work is?

The ratio of working efficiency at X and Y is 3:7. Working together, they can complete the work in 15 days. They together worked for 7 days. Then, find the time taken by X to complete 60% at the remaining work.

A and B together can do a certain work in x days. Working alone, A and B can do the same work in (x+8) and (x+18) days, respectively. A and B together will complete $$ {5\over 6}$$ of the same work in;

7 men or 10 women can build a 100-meter-long wall in 10 days, then how many days will it take 14 men and 20 women to build a 600-meter-long wall?