Multiple choice

A person is running at 9 km/hr. He has to cross a tunnel of length 750 m. The time he will take to cross the tunnel is 100 K seconds. The value of K is

  1. 300

  2. 3

  3. 1

  4. 30/100

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

9 km/h = 9 X (5/18) m/sec              = 2.5 m/sec. The person covers a distance of 2.5 m in 1 sec. The person will cover distance of 750 m in (750 / 2.5) sec = 300 seconds 300 sec = (100 X 3) sec. Therefore, K = 3.

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