Question

(b) An object covers first 50 km in 3 hours' time and next 100 km in 5 hours
time find its average speed.
​

Answer 1

Answer:

90 km/h

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