Three pipes which has radius 1, 2, 3 can respectively are connected to a tank water flowing in that pipes is square of radius of that pipes respectively. If the thin-nest piepe fills a tank in 42 minutes. How much time will they take to fill that tanke together.

A pipe Can fill a tanke in 10 hours. The other pipe can fill a tank in 15 hours. How much time will they take to fill that tank together.

An inlet pipe fills 1/8 part of a tank in 1 h. How much time will the pipe take to fill the empty tank?

Three pipes which has radius 1/2, 1, 3/2 can respec- tively are connected to a tank. The ratio of the water flowing through them is equal to the ratio of the square of their radius . If all three pipes fill that tank in 18 min three how long will thickest pipe take to fill the tank alone.

Two pipes A and B can fill a tank in 18 and 6h , respectively . If both the pipes are opened simultaneously , how much time will be taken to fill the tank?

The diameter of three pipes are 1cm, 1 (1)/(3) cm and 2 cm respectively. The quantity of water flowing through a pipe varies directly as the square of its diameter. If the pipe with 2 cm diameter can fill a tank in 61 minutes, in what time will all the three pipes together fill the tank?

Two pipes A and B can fill a tank in 12 minutes and 18 minutes respectively. If both the pipes are opened simultaneously, how long will they take to fill the tank ?

Pipe A can fill a tank in 30 hours and pipe B in 45 hour.If both the pipes are opened in an empty tank how much time will they take to fill it?

6 pipes can fill a tank in 1 hour 24 minutes. How long will it take to fill the tank if 7 pipes of the same type are used?