A man can row a distance of 8 km downstream in a certain time and can row 6 km upstream in the same time. If he rows 24 km upstream and the same distance downstream in \(1\frac{3}{4}\) hours, then the speed (in km/h) of the current is:
1
\(4\frac{1}{2}\)
2
4
3
3
4
\(2\frac{1}{2}\)