15,000 meters/ 1 hour
Here, we want to make a conversion from kilometers per hour to meters per hour
We have hours in both cases so the only conversion we have to do here is from kilometers to meters
Mathematically, 1 km = 1000 m
Thus, 15 km will be = 15 * 1000 = 15,000 m
So our conversion is 15,000 meters per 1 hour