NumberKey Facts

The Three Essential Compound Measures

Part of Compound Measures · GCSE GCSE Mathematics revision

This key facts covers The Three Essential Compound Measures 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 2 of 8 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 2 of 8

Practice

12 questions

Recall

22 flashcards

The Three Essential Compound Measures

Compound Measure Components Formula Units
Speed Distance ÷ Time S = D/T m/s, mph, km/h
Density Mass ÷ Volume D = M/V g/cm³, kg/m³
Pressure Force ÷ Area P = F/A N/m², Pa (Pascals)

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

12 questions on Compound Measures — practise free

Instant marking, adaptive difficulty, and 22 spaced repetition flashcards. Free until your GCSEs.

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