Practice30Create account

The figure shows a 2,400-litre tank. Inlets A and B and the outlet C are all opened on the empty tank. How long does it take to fill?

Competition practicePipes & Cisterns
  • A8 h
  • B5 h
  • C6 h
  • D4.8 h

Step-by-Step Solution

A: L/h, B: L/h, C drains 100 L/h. Net 400 L/h → h. (4.8 h ignores C.)
Answer: C) 6 h

Master this topic in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Pipes & Cisterns practice questions

More Pipes & Cisterns practice

Pipe A fills a tank in 15 minutes and pipe B in 10 minutes. A runs alone for the first 5…A tank is one-fourth full. Two pipes that can fill it in 15 minutes and 20 minutes are…Inlets A and B fill a tank in 30 and 45 minutes, and outlet C empties it in 36 minutes.…A pipe pours 20 litres per minute into an empty 600-litre tank. After 10 minutes a crack…One inlet fills 40% of a tank in 2 hours; a second inlet fills 25% of it in 1.5 hours.…