We know she ran 8 kilometers per hour. She ran for a TOTAL of 2 hours. To find out how many kilometers she ran, you would multiply 8 kilometers times 2 hours. This would get you the distance of 16 kilometers. Serena ran 16 kilometers on her training run.
Formula Form:
We have been given the formula d = rt, where d represents the distance she ran, r representing the rate, and t representing the time. Now we have to fill in those values. We have already calculated the distance which is 16 kilometers, so we will fill that in as d: 16 = rt. Now, the rate she is running is 8 kilometers per hour. Let's fill that in. 16 = 8t. Now we have to fill in the last value which is how long she ran for, in other words the time. In the question it states that Serena ran for 2 hours. That gives us our last value. 16 = 8(km)2(hr)
