Mathematics for IGCSE & O level - Limits Of Accuracy (Section 1 - No. 29)

A drain cleaner uses a pole made up of ten identical flexible pieces. Each piece is 1 metre long, measured to the nearest centimetre. What is the minimum possible length of drain the cleaner could reach?

9.90 m

9.95 m

10.0 m

10.05 m

Explanation

Since each piece is 1m long to the nearest cm, the lower bound of each piece is 0.995m. Therefore the lower bound of the total is 10 * 0.995 = 9.95m

Mathematics for IGCSE & O level - Limits Of Accuracy (Section 1 - No. 29)

Explanation

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