Two cyclists start from the same place in opposite directions. One goes towards north at 9 kmph and the other goes towards south at 10 kmph. What time will they take to be 47.5 km apart?
1
\(2\frac{1}{2} = hrs\)
2
\(4\frac{1}{2} = hrs\)
3
\(4\frac{1}{4} = hrs\)
4
\(2\frac{1}{4} = hrs\)