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A train is moving at 72 km/h and a bird flies in the opposite direction at 18 km

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Question: A train is moving at 72 km/h and a bird flies in the opposite direction at 18 km/h. What is the speed of the bird relative to the train?

Options:

  1. 54 km/h
  2. 72 km/h
  3. 90 km/h
  4. 18 km/h

Correct Answer: 54 km/h

Solution: 

Relative speed = Speed of train + Speed of bird = 72 km/h + 18 km/h = 90 km/h.

A train is moving at 72 km/h and a bird flies in the opposite direction at 18 km

Practice Questions

Q1
A train is moving at 72 km/h and a bird flies in the opposite direction at 18 km/h. What is the speed of the bird relative to the train?
  1. 54 km/h
  2. 72 km/h
  3. 90 km/h
  4. 18 km/h

Questions & Step-by-Step Solutions

A train is moving at 72 km/h and a bird flies in the opposite direction at 18 km/h. What is the speed of the bird relative to the train?
Correct Answer: 90 km/h
  • Step 1: Identify the speed of the train, which is 72 km/h.
  • Step 2: Identify the speed of the bird, which is 18 km/h.
  • Step 3: Since the bird is flying in the opposite direction to the train, we need to add the speeds together.
  • Step 4: Calculate the relative speed by adding the speed of the train and the speed of the bird: 72 km/h + 18 km/h.
  • Step 5: The result of the addition is 90 km/h, which is the speed of the bird relative to the train.
  • Relative Speed – Relative speed is the speed of one object as observed from another object, calculated by adding their speeds when they are moving in opposite directions.
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