Two water taps together can fill a tank in \(9\frac{3}{8}\) hours. The tap of larger diameter takes 10 hours less than the smaller one to fill the tank separately. The time (in hours) in which each tap can separately fill the tank is respectively
1
10, 20
2
15, 25
3
5, 15
4
More than one of the above
5
None of the above