NumberDeep Dive

Mastering Unit Conversions

Part of Compound MeasuresGCSE Mathematics

This deep dive covers Mastering Unit Conversions within Compound Measures for GCSE Mathematics. Revise Compound Measures in Number for GCSE Mathematics with 12 exam-style questions and 22 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 4 of 7 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 4 of 7

Practice

12 questions

Recall

22 flashcards

Mastering Unit Conversions

Speed Conversions

  • m/s to km/h: multiply by 3.6
  • km/h to m/s: divide by 3.6
  • m/s to mph: multiply by 2.24
  • mph to m/s: divide by 2.24

Common Unit Conversions

From To Method
g/cm³ kg/m³ × 1000
kg/m³ g/cm³ ÷ 1000
cm³ ÷ 1,000,000
cm² ÷ 10,000

Keep building this topic

Read this section alongside the surrounding pages in Compound Measures. That gives you the full topic sequence instead of a single isolated revision point.

Practice Questions for Compound Measures

Which formula correctly gives speed in terms of distance and time?

  • A. Speed = Distance × Time
  • B. Speed = Time ÷ Distance
  • C. Speed = Distance ÷ Time
  • D. Speed = Distance + Time
1 markfoundation

A car travels 80 km at 40 km/h and then 80 km at 80 km/h. Explain why the average speed for the whole journey is NOT 60 km/h.

2 marksstandard

Quick Recall Flashcards

Convert 72 km/h to m/s
Divide by 3.6 72 ÷ 3.6 = 20 m/s Check: 72 km/h means 72000 m per 3600 s 72000 ÷ 3600 = 20 m/s
Convert 25 m/s to km/h
Multiply by 3.6 25 × 3.6 = 90 km/h Check: 25 m/s means 25 metres per second 25 × 3600 ÷ 1000 = 90 km/h

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