Multiple choice

Three athletes, Sarah, Mike, and Anna, are competing in a 10-kilometer race. Sarah runs at a constant speed of 15 kilometers per hour, Mike runs at a constant speed of 12 kilometers per hour, and Anna runs at a constant speed of 10 kilometers per hour. If all three athletes start at the same time, who will cross the finish line first, and how long will it take for them to cross the finish line?

  1. Sarah will cross the finish line first in 40 minutes.

  2. Sarah will cross the finish line first in 50 minutes.

  3. Anna will cross the finish line first in 60 minutes.

  4. Mike will cross the finish line first in 42 minutes.

  5. a
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A Correct answer
AI explanation

Using the formula Time equals Distance divided by Speed, Sarah takes 10 divided by 15 hours, which equals 2/3 of an hour, or 40 minutes. Mike takes 10 divided by 12 hours, equaling 5/6 of an hour, or 50 minutes. Anna takes 10 divided by 10 hours, equaling 1 full hour, or 60 minutes. Sarah has the shortest time, so Sarah will cross the finish line first in 40 minutes.

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