A boat travels upstream and after one hour has gone 10 km. The boat next travels downstream and after one hour has gone 16 km. If the boat's speed relative to the water is constant, what is the speed of the current in the river?
a. 1 km/h
c. 3 km/h
b. 2 km/h
d. 4 km/h
C
Physics & Space Science
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