A bus travels east in and then a further east in

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A bus travels 30 km30\,\text{km} east in 30 min30\,\text{min} and then a further 20 km20\,\text{km} east in 40 min40\,\text{min}. What is the magnitude of the bus’s average velocity for the whole journey? (a) 50 km h−150\,\text{km h}^{-1} (b) 43 km h−143\,\text{km h}^{-1} (c) 71 km h−171\,\text{km h}^{-1} (d) 45 km h−145\,\text{km h}^{-1}

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