A and B are travelling towards each other from the points P and Q respectively. After crossing each other, A and B take `6(1)/(8)` hours and 8 hours respectively to reach their destinations Q and P respectively. If the speed of B is 16.8 km/h, then the speed (in km/h) of A is

Options

A. `20.4`
B. `20.8`
C. `19.2`
D. `19.8`

Answer

C