Unit 9 Lesson 7: Exercise 2
NOW TRY THESE – Ignore the Units of Measurement when writing answers. Write only the numbers. Eg. write 3cm as 3.
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Question 1 of 51. Question
1) The masses to the nearest 0.5kg of two boxes are 4.5kg and 9.1kg. Calculate the lower and upper bounds of their combined mass.
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UB = LB =
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Question 2 of 52. Question
2) The area of a circle is 300cm2 given to 2s.f. Calculate the upper and lower bounds of the radius and the circumference.
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Radius: UB = LB =
Circumference: UB = LB =
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Question 3 of 53. Question
3) The population of Ghana is 131 000 000 to the nearest million. The area of Ghana is 784 000km2 to the nearest 1000km2. Find the upper and lower bounds for the population density of Ghana in people/km2. (Population density of any country is the total population divided by the area)
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UB = LB =
CorrectIncorrect -
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Question 4 of 54. Question
4) The radius of a circle is 8.5cm given to 1 decimal place. Calculate the upper and lower bounds of:
a) the circumference,
b) the area.
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Circumference: UB = LB =
Area: UB = LB =
CorrectIncorrect -
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Question 5 of 55. Question
5) A cylindrical water tank has a volume of 6000cm3 correct to 1 significant figure (s.f). A full cup of water from the tank has a volume of 300 cm3 correct to 2 s.f. Calculate the maximum number of full cups of water that can be drawn from the tank.
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= cups
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