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A train 180 m long crosses a 120 m platform in 15 seconds. Its speed in km/h is
A54
B60
C72
D80
Answer & Solution
Correct answer: C. 72
Distance covered = 180 + 120 = 300 m in 15 s ⇒ 20 m/s. Convert to km/h: 20 × 18/5 = 72 km/h.
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