Lesson eLearning

A cyclist covers 45 km in 3 hours 30 minutes. What is his average speed in km/h?

medium 2 marks Class 7 · Science · Motion and Time
Answer
12.86 km/h

The correct answer is 12.86 km/h — Rounded to two decimals: 12.86 km/h.

Step-by-step solution

  1. Convert time to hours: 3 h 30 min = 3 + 30/60 = 3.5 h.
  2. Average speed = distance ÷ time.
  3. Speed = 45 ÷ 3.5 = 12.857 km/h.
  4. Rounded to two decimals: 12.86 km/h.
Common mistake: Using minutes as hours or not converting minutes

Concept tested: Average speed from distance and time

Published · How this solution was prepared and checked

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