Multiple choice

Priya jogged for a total of $30$ minutes. Her average speed for the first $10$ minutes was $5$ miles per hour. During the last 20 minutes, she jogged $2.5$ miles. What was the average speed of her entire jog?

  1. $6\dfrac {1}{2} mph$
  2. $3\dfrac {1}{3} mph$
  3. $7\dfrac {1}{2} mph$
  4. $7\dfrac {1}{3} mph$
  5. $7\dfrac {2}{3} mph$
Reveal answer Fill a bubble to check yourself
B Correct answer
AI explanation

First, find the total distance jogged using Distance equals Speed multiplied by Time. The distance for the first 10 minutes (1/6 of an hour) is 5 multiplied by 1/6, which equals 5/6 miles; adding this to the 2.5 miles jogged later gives a total distance of 10/3 miles. Since 30 minutes is 1/2 of an hour, divide 10/3 miles by 1/2 hour to find the average speed, making the result 3 1/3 mph.

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