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Compound Measures (Speed, Density, Pressure)Cambridge IGCSE Maths: Subtopic test

10 questions, 26 marks

Cambridge IGCSE Maths

Compound Measures (Speed, Density, Pressure)

Total 26 marks

Name

Class

Date

  1. 1
    A cyclist travels 45 km in 2.5 hours at a constant speed.
    (a)
    Find the cyclist's average speed.
    [1 mark]
    • A15 km/h
    • B18 km/h
    • C20 km/h
    • D22.5 km/h
    (b)
    At the same speed, how far would she travel in 4 hours?
    [1 mark]
    • A60 km
    • B66 km
    • C72 km
    • D80 km
    (c)
    At the same speed, how long would it take to travel 63 km?
    [1 mark]
    • A3 hours
    • B3.5 hours
    • C4 hours
    • D4.5 hours

    Total for question 1: 3 marks

  2. 2
    A metal block has a mass of 540 g and a volume of 60 cm3^3. A second block, made of the same material, has a volume of 85 cm3^3.
    (a)
    Find the density of the metal block.
    [2 marks]
    (b)
    Find the mass of the second block, which has a volume of 85 cm3^3 and is made of the same material.
    [2 marks]

    Total for question 2: 4 marks

  3. 3
    A force of 250 N is applied over an area of 0.5 m2^2. Meanwhile a tap fills a tank at a flow rate of 12 litres per minute.
    (a)
    Find the pressure exerted, using pressure = force ÷\div area.
    [3 marks]
    (b)
    Find how long the tap would take to fill an empty tank of capacity 90 litres, giving your answer in minutes and seconds.
    [3 marks]

    Total for question 3: 6 marks

  4. 4
    A city has a population of 850000 people and covers an area of 340 km2^2. A currency exchange booth converts money at a rate of 1 dollar to 3.67 units of local currency, charging a flat fee of 5 dollars per transaction.
    (a)
    Find the population density of the city, in people per km2^2.
    [4 marks]
    (b)
    A tourist exchanges 200 dollars. Find the amount of local currency received, given the flat fee is deducted first and the remaining dollars are then converted.
    [4 marks]
    (c)
    A second city has an area of 280 km2^2 and a population density of 3200 people per km2^2. Find its population, then find the combined population density of both cities together (total population divided by total area), correct to 1 decimal place.
    [5 marks]

    Total for question 4: 13 marks

End of questions