Question

A tank has 500 litre of water. There is a crack in it and water is leaking out at the rate of the 5 litre per minute.
How long will it take for the time to become?

Answer 1

Answer:

5 litre in 1 min

then 1 litre in 1/5 min

then 500 litre in (1/5)×500 =100 min

that 1 hour 40 min