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A body is projected vertically up with a...

A body is projected vertically up with a velocity v and after some time it returns to the point from which it was projected. The average velocity and average speed of the body for the total time of flight are

A

`sqrt((3v_(0))/(2alpha))`

B

`((3v_(0))/(2alpha))^(1/2)`

C

`sqrt((3v_(0)^(2))/(2alpha))`

D

`((3v_(0)^(2))/(2alpha))^(1/3)`

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The correct Answer is:
B
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