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A car travels at a speed of 80 km/h and a truck travels at 60 km/h in the same d

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Question: A car travels at a speed of 80 km/h and a truck travels at 60 km/h in the same direction. How far apart will they be after 2 hours if they start together?

Options:

  1. 20 km
  2. 40 km
  3. 60 km
  4. 80 km

Correct Answer: 40 km

Solution: 

Relative speed = 80 - 60 = 20 km/h. Distance = speed * time = 20 * 2 = 40 km.

A car travels at a speed of 80 km/h and a truck travels at 60 km/h in the same d

Practice Questions

Q1
A car travels at a speed of 80 km/h and a truck travels at 60 km/h in the same direction. How far apart will they be after 2 hours if they start together?
  1. 20 km
  2. 40 km
  3. 60 km
  4. 80 km

Questions & Step-by-Step Solutions

A car travels at a speed of 80 km/h and a truck travels at 60 km/h in the same direction. How far apart will they be after 2 hours if they start together?
  • Step 1: Identify the speed of the car, which is 80 km/h.
  • Step 2: Identify the speed of the truck, which is 60 km/h.
  • Step 3: Since both vehicles are traveling in the same direction, calculate the relative speed by subtracting the truck's speed from the car's speed: 80 km/h - 60 km/h = 20 km/h.
  • Step 4: Determine the time they travel, which is 2 hours.
  • Step 5: Use the formula for distance, which is distance = speed * time. Here, the speed is the relative speed (20 km/h) and the time is 2 hours.
  • Step 6: Calculate the distance: 20 km/h * 2 hours = 40 km.
  • Step 7: Conclude that after 2 hours, the car and truck will be 40 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 – The formula for distance, which is distance = speed × time, is used to determine how far apart two objects will be after a certain time.
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