This study notes covers Worked Example within Speed, Distance, Time for GCSE Mathematics. Revise Speed, Distance, Time in Ratio & Proportion for GCSE Mathematics with 14 exam-style questions and 12 flashcards. This topic shows up very often in GCSE exams, so students should be able to explain it clearly, not just recognise the term. It is section 3 of 4 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.
Worked Example
A car travels 150 km in 2.5 hours. Calculate the average speed.
Step 1 Write the formula
Speed = Distance ÷ Time
Step 2 Substitute values
Speed = 150 ÷ 2.5
Step 3 Calculate
Speed = 60 km/h
Practice questions for Speed, Distance, Time
Which formula correctly shows the relationship between speed (S), distance (D), and time (T)?
A car travels at 30 km/h for 2 hours, then at 90 km/h for 1 hour. The mean of the two speeds is (30 + 90) ÷ 2 = 60 km/h. Explain why the average speed for the journey is NOT 60 km/h.