a train covers half of its journey with a speed of 30 metre per second and the other half the speed of 40 metre per second calculate the average speed of train during then whole journey
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Answered by
12
Answer:
let total distance = x
time1 = x/30
time2= x/40
total time = 7x/120
avg speed = total distance / total tym
= (x/7x )×120 = 17.14 m/s
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Answered by
5
Explanation:
Let the distance covered by train = 2x m
Case 1:
Speed = 30 m/s
Time Taken = (x m)/(30 m/s) = x/30 s
Case 2:
Speed = 40 m/s
Time Taken = (x m)/(40 m/s) = x/40 s
So, Average Speed = Total Distance Covered / Total Time Taken
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