Lesson eLearning

A car travels 135 km in 4 hours and 30 minutes. What is its average speed in km/h?

easy MCQ 1 mark Class 7 · Science · Motion and Time
  1. 25 km/h
  2. 30 km/h
  3. 32 km/h
  4. 35 km/h
Answer
30 km/h

The correct answer is 30 km/h — Select the correct option: 30 km/h is option B.

Step-by-step solution

  1. Convert 4 hours 30 minutes to 4.5 hours, because speed formula requires hours.
  2. Use the average speed formula: speed = distance ÷ time.
  3. Calculate 135 km ÷ 4.5 h = 30 km/h.
  4. Select the correct option: 30 km/h is option B.
Common mistake: Dividing total distance by average of speeds instead of total time

Concept tested: Average speed of moving object

Published · How this solution was prepared and checked

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