6 pumps are required to fill a tank in1 hour 20 minutes. How long will it take if only 5 pumps of the same type are used?

5 pumps are required to fill a tank in 1 1/2 hours. How many pumps of the same type are used to fill the tank in half an hour.

A tank can be filled by 5 pipes in 80 minutes. How long it will take to fill the tank by 8 pipes of same size?

If A pump can take 5 hrs to fill a 50 l of tank then how much time to take to fill a 75 litres of tank for the same pump?

If a pipe can fill a tank of capacity 50 l in 5 hours. Then how long will it take to fill a tank of capacity 75 l.

An empty swimming pool is to be filled up to 9/10 of its capacity. A pump takes half an hour to fill 3/10 of the pool, how long will it take to fill 9/10 of the pool?

Water is pouring into a conical vessel as shown in the adjoining figure at the rate of 1.8 m^(3) per minute. How long will it take to fill the vessel?