A car travels 40 km in an hour. in the next two hours it travels 78 km. what is the average speed of the car?

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04-01-2017
Physics

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A car travels 40 km in an hour. in the next two hours it travels 78 km. what is the average speed of the car?

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AndrewDawsonYT AndrewDawsonYT · Answer 1 · 2017-01-04T12:12:42+01:00

AndrewDawsonYT AndrewDawsonYT

04-01-2017

To work this out using the speed equation:

s = d/t

therefore,

d = 40000m (km = 1000m) so, 40 * 1000 = 40000
t = 2h

s = 40000/2 = 20000m

s= 20kmh.

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