How to Solve Speed, Distance and Time — Step by Step Guide

Step-by-Step Method

1. 1

   The basic formula: Distance = Speed × Time. Rearrange to find any unknown.

2. 2

   Speed = Distance / Time. Time = Distance / Speed.

3. 3

   Convert units: km/h to m/s → multiply by 5/18. m/s to km/h → multiply by 18/5.

4. 4

   For average speed: Average speed = Total distance / Total time (not the average of two speeds).

5. 5

   For relative speed: same direction → subtract speeds; opposite direction → add speeds.

Worked Example

Common Mistakes to Avoid

• ✗

  Averaging two speeds instead of using total distance / total time.

• ✗

  Not converting units — mixing km/h with m/s.

• ✗

  Forgetting that when two objects move towards each other, relative speed = sum of speeds.

• ✗

  Not drawing a timeline or distance diagram for complex problems.

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Frequently Asked Questions

How do I solve Speed, Distance and Time problems?

The basic formula: Distance = Speed × Time. Rearrange to find any unknown. Speed = Distance / Time. Time = Distance / Speed.

What are common mistakes in Speed, Distance and Time?

Averaging two speeds instead of using total distance / total time. Not converting units — mixing km/h with m/s.

Which class covers Speed, Distance and Time?

Speed, Distance and Time is typically taught in Class 7, 8. SparkEd has free practice for all these grades.

Where can I practise Speed, Distance and Time for free?

SparkEd offers free chapter-wise practice for Speed, Distance and Time aligned to CBSE, ICSE, and IB curricula. Visit sparkedmaths.com to start.