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A stone of 1 kg tied up with 10/3 m long...

A stone of 1 kg tied up with 10/3 m long string rotated in a vertical circle. If the ratio of maximum and minimum tension in string is 4 then speed of stone at highest point of circular path will be ( `g = 10 ms^2)`

A

`20m//s`

B

`10sqrt3m//s`

C

`5sqrt2m//s`

D

`10m//s`

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The correct Answer is:
D
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