Question

4 a runner wanted to see if his speed would change on different track surfaces. he ran at a comfortable pace on grass, gravel, concrete, and turf. he measured the amount of time it took to run 1,000 meters. what is the average speed of the fastest track? round to the nearest whole number a 161 m/min b 175 m/min c 200 m/min d 182 m/min

Explanation:

Step1: Identify the fastest track

The fastest track is the one with the least time. Among the times \(6.2\), \(5.7\), \(5.0\), and \(5.5\) minutes, the least time is \(5.0\) minutes (concrete track).

Step2: Calculate the speed

The formula for speed \(v=\frac{d}{t}\), where \(d = 1000\) meters and \(t = 5.0\) minutes.

$$v=\frac{1000}{5}=200\space m/min$$

Answer:

C. \(200\space m/min\)