# algebra

posted by oscar

A student runs 100 meters in 11 seconds. What is the speed of the student?

speed = distance over time; 1 mile = 1609 meters

9.1 miles per hour

16 miles per hour

20.3 miles per hour

24 miles per hour
pls help

1. Steve

100m/11s * 1mi/1609m * 3600s/hr = 20.3 mi/hr

Just keep track of the units, and use the conversion factors that make them cancel out the way you want.

2. P

20.3

3. Eli

15

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