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A train of length 220 metres crosses an electric pole in 11 seconds and crosses another train of the same length travelling in opposite dir…

5129Medium DSSSB TGT Computer Science 0 replies 0 views
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A train of length 220 metres crosses an electric pole in 11 seconds and crosses another train of the same length travelling in opposite direction in 8 seconds. What is the speed of the second train?
  • A46 m/s
  • B37 m/s
  • C42 m/s
  • D35 m/s
Correct answer: D

Explanation

Speed of the first train = 220/11 = 20 m/s. Relative speed = 440/8 = 55 m/s, so the second train's speed = 55 − 20 = 35 m/s.

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