A body moving along a straight line travels one third of the total distance with a speed of 3.0 m s -1 . The remaining distance is covered with a speed of 4.0 m s -1 for half the time and 5.0 m s -1 for the other half of the time. The average speed during the motion is
Text Solution
Verified by ExpertsThe correct answer is:
C
Let s be the total distances travelled by the body. Let 
be the time taken to cover the first one their of the distance. Then
Let 
be the time taken for each of the remaining two journeys. Then
or 
or 
Average speed 
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