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A particle describes a horizontal circle...

A particle describes a horizontal circle in a conical funne whoses inner surface is smooth with speed of `0.5m//s` . What is the height of the plane of circle from vertex the funnel?

A

`0.25 cm`

B

`2 cm`

C

`4 cm`

D

`2.5 cm`

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The correct Answer is:
D
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