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If the section of a bridge on a river is...

If the section of a bridge on a river is an arc of a circle of radius 88.2m, then the maximum speed with which a car can travel over the bridge without losing contact with the ground level will be

A

29.4 `m//s`

B

9 `m//s`

C

81 `m//s`

D

18 `m//s`

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