Question

A car travels a distance of 100 km in 2 h. Its
average speed is 50 km h–1. The car might
not have travelled at 50 km h–1 all the time.
Sometimes it might have travelled faster and
sometimes slower than this.


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Answer 1

Answer:

Total time for the journey, t=100/45=20/9 hrs

Time for first 50 km, t

1

=50/30=5/3 hr

So, time for remaining journey, t

2

=20/9−5/3=5/9 hrs

Speed for remaining journey v

2

=

5/9

50

=90 km/h

Answer 2

Explanation:

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