P can complete a piece of work in 8 days, Q in 10 days and R in 12 days. Q and R together worked for 3 days then R was replaced by P. In how many days will the remaining work be completed?
A group of men decided to do a job in 4 days, but 20 men dropped out every day. Find the number of men who initially decided to do the job, if the job was completed in 7 days?
Tap A takes 4 minutes more to fill a cistern than that of A and B together take. Tap B takes 9 minutes more than that of A and B together take. Find the time taken by A and B working together to fill the cistern.
24 men can complete a piece of work in 16 days. The same work can be completed by 8 women in 72 days. Whereas 24 children take 32 days to complete it. If 10 men, 15 women and 24 children work together, in how many days can the work be completed?
Ayush has two candles of the same height, candle A and candle B, which can burn completely for 4 hours and 6 hours respectively. Once when there was no power supply, Ayush lit both the candles simultaneously. Find the time after which the ratio of their height will be 2:3.
A pipe ‘P1’ can fill a tank in 12 hours. Due to the development of a whole in the bottom of the tank 1/3rd of the water filled by the pipe ‘P1’ leaks out. Find the time when the tank will be full
3 pumps working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in one day?
A can do a piece of work in 7 days working 9 hours each day and B does the same work in 6 days working 7 hours each day. How long it will take them to complete it, working hours a day.
Two train are moving in the same direction at 50 km/hr and 30 km/hr. The faster train crosses a man in the slower train in 18 seconds. Find the length of the faster train.
A tank is normally filled in 4 hours. However, it takes 5 hours when there is a leak in its bottom. If the tank is half filled, in how much time shall the leak empty it?
