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A train travels at a speed of 90 km/h and a car at 60 km/h. If they start from t

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Question: A train travels at a speed of 90 km/h and a car at 60 km/h. If they start from the same point and travel in the same direction, how far apart will they be after 1 hour?

Options:

  1. 30 km
  2. 20 km
  3. 10 km
  4. 40 km

Correct Answer: 30 km

Solution: 

Relative speed = 90 - 60 = 30 km/h. Distance apart after 1 hour = 30 km.

A train travels at a speed of 90 km/h and a car at 60 km/h. If they start from t

Practice Questions

Q1
A train travels at a speed of 90 km/h and a car at 60 km/h. If they start from the same point and travel in the same direction, how far apart will they be after 1 hour?
  1. 30 km
  2. 20 km
  3. 10 km
  4. 40 km

Questions & Step-by-Step Solutions

A train travels at a speed of 90 km/h and a car at 60 km/h. If they start from the same point and travel in the same direction, how far apart will they be after 1 hour?
  • Step 1: Identify the speed of the train, which is 90 km/h.
  • Step 2: Identify the speed of the car, which is 60 km/h.
  • Step 3: Calculate the difference in speed between the train and the car. This is done by subtracting the car's speed from the train's speed: 90 km/h - 60 km/h.
  • Step 4: The result of the subtraction gives us the relative speed, which is 30 km/h.
  • Step 5: Since they are traveling for 1 hour, we need to find out how far apart they will be after that time. We use the relative speed for this calculation.
  • Step 6: Multiply the relative speed (30 km/h) by the time (1 hour): 30 km/h * 1 hour = 30 km.
  • Step 7: Therefore, after 1 hour, the train and the car will be 30 km apart.
  • Relative Speed – The speed of one object as observed from another object, calculated by subtracting the speeds of the two objects when they are moving in the same direction.
  • Distance Calculation – Using the formula distance = speed × time to determine how far apart two objects will be after a certain period.
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