Ravi can row a boat in still water at the speed of 14 km/h. If a river is flowing at the speed of 2 km/h and Ravi takes 3 hours to cover a certain disiance upstream, then bow much time will he take to cover the same distance downstream?

A

2 h 20 m

B

2 h

C

2 h 15 m

D

2 h 30 m