A motorist travelled at an average speed of 48 km/h for 1 1/3 hours and then drove another 56km in 2/3 of an hour. What was her average speed for the whole journey?

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Answer 1 · 2018-07-11T05:35:51

The average speed is #=50.67kmh^-1#

Apply the equation

#v=d/t#

The total distance travelled is

#d=(48*4/3)+(56*2/3)=64+112/3=304/3km#

The total time taken is

#t=4/3+2/3=6/3=2h#

The average speed is

#barv=d/t=(304/3)/2=50.67kmh^-1#