Francisco E. answered • 07/10/14

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Francisco; Civil Engineering, Math., Science, Spanish, Computers.

First we have to make all units compayible, it is to have apples to apples.

2 Km/h = 2/60 km/min = 0.03 km/min

2h 24 min=144 min.

12km/144 min= 0.083 km/min

The stream speed will be 0.083-0.03 = 0.053 km/min

The stream speed is 0.053 * 60 = 3.18 km/hr.

I would say answer c.