Mathematics for IGCSE & O level - Limits Of Accuracy (Section 2 - No. 34)

Can cycles 14.2km (to 3 significant figures) in a time of 46 minutes (to the nearest minute). What is the lower bound of their average speed in kilometers per hour?

18.3 km/h

18.4 km/h

18.5 km/h

18.6 km/h

Explanation

Lower bound of speed = Lower bound of distance / Upper bound of time. Lower Bound distance = 14.15 km; Upper Bound Time = 46.5 minutes = 0.775 hours. Speed = 14.15/0.775 = 18.258~18.3 km/h (to 3.s.f)

Mathematics for IGCSE & O level - Limits Of Accuracy (Section 2 - No. 34)

Explanation

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