NumberKey Facts

The Three Essential Compound Measures

Part of Compound MeasuresGCSE Mathematics

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 7 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 7

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

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