Two pipes can fill a tank in 9 hours. If the bigger of the pipes has a rate of 1 ½ times of the smaller, how long would it take each pipe to fill the tank if opened alone?

Answer 1

(3 / 2s) + (1 / s) = 1 / 9

27/2 + 9 = s = 45/2

b = 2/3 s = 15