Question

Wallace ran 100 meters in 12 seconds at a track meet. What was Wallace's speed, in Kilometers per hour?

Answer 1

1000 meters = 1 kilometer
3600 seconds = 1 hour
So, 100 meters = 0.1 kilometer
12 seconds = 1/300 hour

0.1 kilometer = 1/300 hour
x = 1 hour
x/300 = 0.1
x=30 kilometers per hour

Wallace ran 30 kilometers per hour

Answer 2

Yeah