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NIELIT 2022 Feb Scientist C - Section C: 3

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A train running with a speed of $60 \text{km/hr.}$ crosses a train going with $42 \text{km/hr.}$ in the same direction. A person sitting in the faster train observes that it had taken $1.2$ minutes to completely cross the slower train. Find the length of the slower train.

  1. $420$ meters
  2. $540$ meters
  3. $360$ meters
  4. $280$ meters
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