POTW76 Solution

Answer to POTW76 is 1 more hour.

In the first hour the two pipes fill \frac{1}{3} + \frac{1}{4} = \frac{7}{12} of the pool per hour.
After the drain was opened, the pool is filled at \frac{7}{12} - \frac{1}{6} = \frac{5}{12} of the pool per hour.
So it takes one more hour to fill the pool.

By PC Toh, on December 14, 2012 at 5:54 am, under POTW Solutions. No Comments
Post a comment or leave a trackback: Trackback URL.

Leave a comment