A boat whose velocity through the water is 14 km/h is moving in a river whose current is 6 km/in relative to?

Question

the riverbed. The velocity of the boat relative to the riverbed must be between.

A. 6 & 20 km/h

B. 6 & 14 km/h

C. 8 & 20 km/h

D. 8 & 14 km/h

Answer 1

(assuming "6 km/in" is really "6 km/h" in the question)

The fastest the boat could be going is if traveling with the direction of the river, in which case you add the velocities:

6 + 14 = 20 km/h

The slowest would be against the current, in which case you subtract:

6 - 14 = -8 km/h (or 8 km/h upstream)

So, the answer would be C. 8 & 20 km/h