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A body travelling along a straight line , one thired of the total distance with a velocity ` 4 ms^(-1)`. The remaining part of the distance was covered with a velocity ` 2 ms^(-1)` for half the time and with velocity ` 6 ms^(-1)` for the other half of time . What is the mean velocity averaged over te whle time of motin ?

A

5m/s

B

4m/s

C

`4.5m//s`

D

`3.5m//s`

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The correct Answer is:
B
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