Question:
A train of 150 m length is going towards north direction at a speed of 10 m/s. A parrot flies at a speed of 5 m/s towards south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to
A train of 150 m length is going towards north direction at a speed of 10 m/s. A parrot flies at a speed of 5 m/s towards south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to
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When moving in opposite directions, relative speed = sum of speeds.
Updated On: Apr 23, 2026
- 12 s
- 8 s
- 15 s
- 10 s
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Relative speed = speed of train + speed of parrot (since opposite directions).
Step 2: Detailed Explanation:
Train speed = 10 m/s (north). Parrot speed = 5 m/s (south).
Relative speed = \(10 + 5 = 15\) m/s.
Time = \(\frac{\text{length of train}}{\text{relative speed}} = \frac{150}{15} = 10\) s.
Step 3: Final Answer:
Thus, time taken = 10 s.
Relative speed = speed of train + speed of parrot (since opposite directions).
Step 2: Detailed Explanation:
Train speed = 10 m/s (north). Parrot speed = 5 m/s (south).
Relative speed = \(10 + 5 = 15\) m/s.
Time = \(\frac{\text{length of train}}{\text{relative speed}} = \frac{150}{15} = 10\) s.
Step 3: Final Answer:
Thus, time taken = 10 s.
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