Multiple choice

A 110 m long train is running at the speed of 60 km/hr. In what time will it cross another 170 m long train standing on a parallel railway track?

  1. 15.6 sec.

  2. 16.8 sec.

  3. 17.2 sec.

  4. 18 sec.

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

When a moving train crosses a stationary object, the distance covered equals the sum of their lengths. Total distance = 110m + 170m = 280m. Convert speed: 60 km/hr = 60 × (5/18) m/s = 50/3 m/s. Time = Distance/Speed = 280 ÷ (50/3) = 280 × 3/50 = 16.8 seconds. Option B is correct. Option A (15.6s) and C (17.2s) are calculation errors, while D (18s) ignores precise conversion.

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