Mathematics for IGCSE & O level - Limits Of Accuracy (Section 3 - No. 43)
A drain cleaner uses a pole made up of ten identical flexible pieces. Each piece is 1 meter long, measured to the nearest centimeter. What is the minimum length of the drain cleaner's pole?
9.9 m
9.95 m
10.0 m
10.05 m
Explanation
Each piece is measured to the nearest centimeter; so it is the lower bound which we use. 1 meter=100cm, so the lower bound is 99.5 cm (0.995 m). 10 pieces is therefore 9.95 m
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