Question

A train covers half of its journey with a speed of 30 m s-1 and the other half with a speed of 40 ms-1

. Calculate the speed of the train

during the whole journey.​

Answer 1

Answer: plz mark brainliest

Explanation:

s = total distance. t1 and t2 are durations for covering half total distance.

s/2 = 30 * t1

s/2 = 40 * t2

So total time duration = t1+t2 = s*[1/60 + 1/80]

Avg velocity = s/(t1+t2)=

240/7 m/s= 34.28 m/s