Multiple choice general knowledge math & puzzles

A train is coming towards a cat, seating in a 30m long tunnel.The Cat is 10m away from that end of the tunnel from where the train is entering the tunnel.If the Cat starts to run towards the train it will meet the train just at the end of the tunnel & if the cat starts to run opposite to the train then also it will meet the train on the opposite end of the tunnel.If the speed of the train is 36mile/hour, than the speed of the cat is..

  1. 24 mile/hour

  2. 36 m/sec

  3. 18 mile/hour

  4. 12 mile/hour
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let train speed be T, cat speed be C. Distance from entrance is 10, tunnel is 30. If cat runs to entrance, it meets train. If it runs to exit (20m), it meets train. This implies the train reaches the entrance in the time the cat runs 10m. The ratio of speeds is 12:36.

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