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?

1 Answer
Jul 11, 2018

The average speed is =50.67kmh^-1

Explanation:

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