Problema Solution
Two drains empty a swimming pool in 5 hours. The smaller drain takes twice as long to empty the pool as the larger drain. How long would it take the smaller drain to empty the pool alone?
Answer provided by our tutors
1/x + 1/2x = 1/5
3/2x = 1/5
x=15/2
Therefore it takes the smaller drain 2*15/2=15 hours to drain the pool by itself (it would take the larger drain 15/2=7.5 hours).
JKJ