# maths

A car travelled 100 km with half the distance at 40km/h and the other half as 80 km/h.Find the average speed of the car for the whole journey.

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1. Half distance = 50 km

The first half:

50 km / 40 km/h = 1.25 h

The second half:

50 km / 80 km/h = 0.625 h

Total time of the travel = 1.25 h + 0.625 h = 1.875 h

average speed = 100 km / 1.875 h = 53.333 km / h

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2. 53.3333h

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3. yes 53.33

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4. 53.33

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