*Common units include miles per hour (mph), kilometers per hour (kph), meters per second (m/s), or feet per second (ft/s).*As for your brand-new red sports car, your friend was exactly right in his calculation of the average speed.

*Common units include miles per hour (mph), kilometers per hour (kph), meters per second (m/s), or feet per second (ft/s).*As for your brand-new red sports car, your friend was exactly right in his calculation of the average speed.

As a member, you'll also get unlimited access to over 79,000 lessons in math, English, science, history, and more. The average speed of an object is the total distance traveled by the object divided by the elapsed time to cover that distance.

3/5 of the distance = 195 miles, so the total distance is 195/(3/5) = 325.

average speed is 50mi/h, total distance is 325 mi, therefore, the total travel time is 325/50 = 6.5 hours.

The two elements we need to calculate average speed are: 1) Total distance traveled2) Elapsed time to cover that distance The round-trip distance can be represented by 2 * D (if we let one-way distance be D), and the round-trip elapsed time is (D / s1) (D / s2) (since one-way elapsed time is one-way distance divided by one-way speed). A runner completes a race according to the distance-time graph shown below.

What is the average speed of the runner for the first 10 seconds?

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