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An aero plane is moving on a circular pa...

An aero plane is moving on a circular path with a uniform speed 300 km/h. If the period of the aero plane is 12 hours, then the average acceleration after half cycle will be

A

zero

B

`100 km//h^2`

C

`50 km//h^2`

D

`25 km//h^2`

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