Multiple choice general knowledge math & puzzles

John is traveling to a meeting that is 18 miles away. He needs to be there in 20 minutes. How fast does he need to go to make it to the meeting on time?

  1. 54 km/hr

  2. 55 km/hr

  3. 87 km/hr

  4. 75 km/hr

  5. 68 km/hr

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

To travel 18 miles in 20 minutes, you need to convert units: 18 miles = 28.97 km, 20 minutes = 1/3 hour. Speed = 28.97 km ÷ (1/3 hour) = 86.9 km/hr, which rounds to 87 km/hr. This is a unit conversion and rate calculation problem.