question_answer

A boat goes downstream in a river and covers a distance between two coastal towns A and B in five hours and covers the same distance along upstream in six hours. If the speed of the flow of the river is 2 km/h, then the speed of the boat is:

A)  20 km/h                       

B)  22 km/h

C)  24 km/h                       

D)  21 km/h

E)  None of these