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To pass a pole, a train covers its own length; to cross a platform, its length plus the platform. Two trains running towards each other add their speeds. A boat goes faster downstream (boat + stream) and slower upstream (boat − stream).
✓ You passed this lesson’s test.
Length and relative speed — “a train must cover its own length (plus a platform); a river adds to or takes from a boat’s speed”
Use it for: Train and boat questions in aptitude, scholarship and later competitive exams; relative speed in physics.
Check: 15 m/s × 30 s = 450 m = 150 + 300 ✓
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20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.
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