Question

1. A car travels 30 km at a uniform speed of
40 km/h and the next 30 km at a uniform speed of
20 km/h. Find its average speed.
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Answer 1

Answer:

Explanation:

The total time for the journey is given as,

t=v1​d1​​+v2​d2​​

=4030​+2030​

=2.25hour

The average speed is given as,

vavg​=td1​+d2​​

=2.2530+30​

=26.67km/h

Thus, the average speed of the car is 26.67km/h.