Lesson T3.4.2

T3.4.2 Compound units: speed, density and unit pricing Quiz: KS3 Maths, Unit 3

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson T3.4.2, Compound units: speed, density and unit pricing: 20 multiple choice questions for the KS3 Maths (National Curriculum), Unit 3: Ratio, proportion and rates of change, written with Revision Ninja.

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The 20 questions

  1. A car travels 150 km in 3 hours at a steady speed. What is its speed?

    • 150 km/h
    • 30 km/h
    • 50 km/h
    • 450 km/h

  2. A runner moves at 5 m/s for 80 seconds. What distance do they cover?

    • 16 m
    • 400 m
    • 85 m
    • 4000 m

  3. A train travels 240 km at a steady speed of 80 km/h. How long does the journey take?

    • 192 hours
    • 3 hours
    • 4 hours
    • 2 hours

  4. A block has a mass of 500 g and a volume of 250 cm³. What is its density?

    • 125 g/cm³
    • 750 g/cm³
    • 2 g/cm³
    • 0.5 g/cm³

  5. A material has a density of 0.9 g/cm³. What is the mass of 200 cm³ of it?

    • 20 g
    • 1800 g
    • 222 g
    • 180 g

  6. Three cans of soup cost £2.40. What is the price of one can?

    • £7.20
    • 72p
    • £0.30
    • 80p

  7. Which is better value: 500 g for £1.50 or 750 g for £2.10?

    • It cannot be decided
    • 750 g for £2.10
    • 500 g for £1.50
    • Both are the same value

  8. A cyclist travels 36 km in 2 hours at a steady speed. What is the speed?

    • 38 km/h
    • 18 km/h
    • 72 km/h
    • 34 km/h

  9. A worker is paid £9 per hour for 6.5 hours. How much are they paid?

    • £55.00
    • £54.50
    • £62.50
    • £58.50

  10. A metal has a density of 8 g/cm³. What is the mass of a 6 cm³ piece?

    • 14 g
    • 48 g
    • 2 g
    • 1.33 g

  11. What is 90 km/h in metres per second?

    • 25 m/s
    • 324 m/s
    • 90 m/s
    • 1.5 m/s

  12. A runner covers 400 m at a steady speed of 5 m/s. How long does this take?

    • 400 seconds
    • 2000 seconds
    • 80 seconds
    • 0.0125 seconds

  13. Four apples cost £1.20. At the same price, how much do 10 apples cost?

    • £4.00
    • £2.40
    • £3.00
    • £12.00

  14. A worker earns £240 for 30 hours of work. What is the hourly rate?

    • £0.125 per hour
    • £8 per hour
    • £270 per hour
    • £7.50 per hour

  15. A car covers 45 km in 30 minutes. What is its average speed in km/h?

    • 15 km/h
    • 1.5 km/h
    • 45 km/h
    • 90 km/h

  16. Oil has a density of 0.8 g/cm³. What is the mass of 500 cm³ of oil?

    • 400 g
    • 0.0016 g
    • 4000 g
    • 625 g

  17. A car travels at 20 m/s for 2 minutes. How far does it go in kilometres?

    • 40 km
    • 0.4 km
    • 2.4 km
    • 2400 km

  18. A tank fills at 15 litres per minute. How many litres are in it after 2.5 hours?

    • 225 litres
    • 2250 litres
    • 37.5 litres
    • 150 litres

  19. A pack of 250 g costs £1.75. What is the cost per gram?

    • 7p per gram
    • 0.07p per gram
    • 1.75p per gram
    • 0.7p per gram

  20. A cyclist rides 60 km in the first hour and 30 km in the second hour. What is the average speed for the whole ride?

    • 45 km/h
    • 30 km/h
    • 42 km/h
    • 60 km/h

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