1. The problem statement, all variables and given/known data Shareen finds that when she drives her motorboat upstream she can travel with a speed of only 8m/s, while she moves with a speed of 12m/s when she heads downstream. What is the current of the river on which Shareen is traveling? 3. The attempt at a solution x= current speed b= boat speed x+b= 12m/s b-x= 8m/s b=x+8 x+x+8= 12 2x= 4 x=2 12m/s-8m/s=4m/s Our physics class is having a debate on whether the answer is 2m/s or 4m/s and why.