Naina and Kalpana working together can do a piece of work in 10 days, whereas Naina alone can do it in 12 days. In how many days can Kalpana do it alone?
'X' and 'Y' can complete a certain job together in 36 days. They worked together for 20 days, after which 'X' left, and 'Y' completed the remaining work...
The team of A B and C was supposed to complete a piece of work. Working alone, A could have completed the same work in 190 hours. B could have completed...
15 men can do a work in 30 days. After 18 days of work, 5 more men were engaged to finish the work. The number of days required to complete the remainin...
A pipe can fill a tank in 14 hours, and B pipe can drain a tank in 21 hours. If a system of N pipes (fill pipes and drain pipes put together) can...
A man travelled a total distance of 200 km. He travelled first 150 km on car with a speed of 30 km/h and rest of the distance on bike whose speed is 20 ...
Pipe ‘A’ and pipe ‘B’ can fill a cistern in 20 minutes and 15 minutes respectively. Pipe ‘C’ alone can empty the cistern in 10 minutes. If a...
A2 type ‘P’ pipes can fill a tank in 450 hours, while B2 type ‘Q’ pipes can fill the same tank in 6...
A can complete a task in 20 days, and B can complete it in 25 days. When B and C collaborate, they can finish the same task in 75/8 days. Now, if A and ...
P can do a piece of work in 12 days, Q can complete double the work in 20 days and R can do the work in 15 days. If all of them together earn Rs. 2500, ...
