Mathematics for IGCSE & O level - Limits Of Accuracy (Section 2 - No. 47)
The population of a town is 108,000 to the nearest 1000. The area is 129 km² to the nearest km². What is the upper bound for the population density?
837.2 km⁻²
837.3 km⁻²
837.4 km⁻²
838.4 km⁻²
Explanation
Population density = Population / Area. Upper bound = Upper bound of Population / Lower bound of Area. Upper bound population is 108500, lower bound area is 128.5. 108500/128.5 = 837.35. Rounded to 1 d.p is 837.4.
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