Practice30Create account

A pipe normally fills a 1,200-litre tank in 20 minutes; because of a leak, it now takes 25% more time. At how many litres per minute does the leak drain?

Competition practicePipes & Cisterns
  • A60 L/min
  • B48 L/min
  • C15 L/min
  • D12 L/min

Step-by-Step Solution

Now 25 min, so net 48 L/min, while the pipe gives L/min. Leak L/min. (48 is the net inflow.)
Answer: D) 12 L/min

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 8 hours and pipe B empties it in 12 hours. With the tank empty, A…A cistern holds 2,000 litres. Its inlet supplies 25 litres per minute; a leak drains 5…Three pipes A, B, C together fill a tank in 4 hours. A and B together take 6 hours, and…A pipe fills a tank in 6 hours. When the tank is full, the pipe is shut and a drain that…Pipe A fills a tank in 3 hours. Pipe B, half as efficient as A, is opened 1 hour after…