Ratio, Rates and Proportions II

  • For each question, choose the most suitable answer.
    • 1. The turning rate of the minute hand of a clock is 360&deg per hour. Express the rate in degrees per minute.
      • A) 60&deg per minute
      • B) 30&deg per minute
      • C) 10&deg per minute
      • D) 6&deg per minute
    • 2. A painting machine can print 360 pieces of paper in 3 minutes. Calculate the rate of printing in pieces per second.
      • A) 360 pieces per second
      • B) 120 pieces per second
      • C) 12 pieces per second
      • D) 2 pieces per second
    • 3. The rate of petrol consumption of Mr Gan's car is 0.12 litres per km. The rate can be written as
      • A) 8.3km per litres
      • B) 12 km per litres
      • C) 12.5 km per litres
      • D) 25 km per litres
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