The drain can empty the water from a full sink in 3 minutes. If the water is running while the drain is open, it takes 8 minutes to empty a full sink. How long would it take to fill an empty sink with the drain closed?
1 Answer
May 6, 2017
Explanation:
Drain open tap closed 1 minute - 1/3 sink
Drain open tap opened 1 minute - 1/8 sink
Drain closed tap opened 1 minute - 1/3 - 1/8
= 8/24 - 3/24
= 5/24
If it fills up 5/24 of the sink in 1 minute then it would take 24/5 minutes to fill the whole sink which is