Two pipes P and Q can fill a tank in 25 minutes and 30 minutes respectively. Pipe R fills the tank at a rate of 15 litres per minute. If all three pip...
Question
Two pipes P and Q can fill a tank in 25 minutes and 30 minutes respectively. Pipe R fills the tank at a rate of 15 litres per minute. If all three pipes working together can fill the tank in 10 minutes, what is the capacity of the tank (in litres)?