Question

a train covers half its journey with a speed of 20m/s and the other half with a speed of 30m/s.the average speed of the train during the whole journey do​

Answer 1

Answer:25m/s

Explanation:

Ave. speed=(20+30)/2

=50/2

=25m/s

Hope it helps.........

PLZ MARK AS BRAINLIEST..........

Answer 2

Answer: let the distance be x

=t1=x/20

=t2=x/30

average speed=total distance/total time

=x/{(x/20)+(x/30)}

=x/(30x+20x)/60

=x/(50x/60)

=x*60/50x

=6/5

=1.2m/s ans.

Explanation: