Multiple choice

Two trains 190m long and 230m long runs with the speed of 35 km/hr and 55 km/hr in the same side. In how much time faster train crosses the slower train? 190 मी. तथा 230 मीटर लम्बी दो रेलगाड़ियाँ क्रमशः 35 किमी./घण्टा और 55 किमी./घण्टा से एक ही दिशा में चल रही है। तेज गाड़ी धीमी गाड़ी को कितने समय में पार कर लेगी?

  1. 80.3 sec 80.3 सेकंड

  2. 75.6 sec 75.6 सेकंड

  3. 64.6 sec 64.6 सेकंड

  4. 54.5 sec 54.5 सेकंड

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

When trains move in the same direction, relative speed = difference of speeds = 55 - 35 = 20 km/hr. Converting to m/sec: 20 × 5/18 = 100/18 m/sec. Total distance to cover = sum of lengths = 190 + 230 = 420 m. Time = Distance/Speed = 420 ÷ (100/18) = 420 × 18/100 = 75.6 seconds.

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