Multiple choice

Jerry ran $12$ miles at a speed of $8$ miles per hour and Tom ran the same distance at $6$ miles an hour. How much will be the difference in minutes in their completion time?

  1. $12$
  2. $16$
  3. $24$
  4. $30$
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D Correct answer
Explanation

Jerry's time = 12 / 8 = 1.5 hours = 90 minutes. Tom's time = 12 / 6 = 2 hours = 120 minutes. Difference = 120 - 90 = 30 minutes.

AI explanation

Using the time formula where time equals distance divided by speed, Jerry's time is 12 miles / 8 mph = 1.5 hours. Tom's time for the same distance is 12 miles / 6 mph = 2 hours. The difference in their completion times is 2 - 1.5 = 0.5 hours, which converts to 30 minutes.

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