Multiple choice

The length of a train and that of a platform are equal. If with a speed of 25 m/sec. the train crosses the platform in one minute, then the length of the platform (in metres) is : एक रेलगाड़ी और एक प्लेटफार्म की लम्बाई सामान है | यदि यह 25 मी./से. की चाल से चल रही है | यदि रेलगाड़ी प्लेटफार्म को एक मिनट में पार करती है, तो प्लेटफार्म की लम्बाई (मी. में) है

  1. 500

  2. 600

  3. 750

  4. 900
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C Correct answer
Explanation

Train length = platform length = L. Total distance to cross = L + L = 2L. Speed = 25 m/s, time = 60 seconds. Distance = speed × time = 25 × 60 = 1500 m. So 2L = 1500, L = 750 m. The train must travel its own length plus the platform length to completely cross.

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