question_answer

A man has to cross the river. He asks the boat man to take him across the river. The boat can row the downstream in 8 hours and return the same distance in 12 hours. If the stream flows at the rate of 2.25 km/h. The distance the boat can row in one hour in still water is:

A)  11.25km

B)  15.5km

C)  18.2km

D)  8.5km

E)  None of these