Multiple choice general knowledge math & puzzles

Two runners started running from a particular point. The first runner runs 60 KMPH towards East and the second 80 KMPH towards North. Both the runners stop after 30 minutes. A third runner starts from the point where the first one stopped. How long will he take to reach the point where the second runner stopped if the third runner runs 100 KMPH?

  1. 40 minutes

  2. 25 Minutes

  3. 30 Minutes

  4. 35 Minutes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Runner 1: 60 km/h × 0.5h = 30 km east. Runner 2: 80 km/h × 0.5h = 40 km north. Distance between points = sqrt(30² + 40²) = 50 km (right triangle). Runner 3 at 100 km/h needs: 50/100 = 0.5 hours = 30 minutes. The 3-4-5 Pythagorean triple applies here.

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