Question

A train covers half of its journey with a speed of 30m/s and
other half with a speed of 40m/s. calculate its average speed for the
entire journey?

Answer 1

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

Answer 2

Hey mate here ur answer :-

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

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