Question (3/28)
Two pipes can fill a tank in 20 and 24 minutes respectively and waste pipe can empty 3 gallons per minutes. All the three pipes working together can fill the tank in 15 minutes. What is capacity of tank ?(A) 60 gallons
(B) 100 gallons
(C) 120 gallons
(D) 150 gallons
Question (4/28)
A leak in the bottom of a tank can empty the full tank in 8 hours. An inlet pipe fills water at the rate of 6 litres per minutes. When the tank is full, the inlet is opened and due to the leak the tank is emptied in 12 hours. What is capacity of tank in litres ?(A) 7500
(B) 7980
(C) 8460
(D) 8640