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A road of width 20 m froms an arc of rad...

A road of width 20 m froms an arc of radius 15 m,its outer edge is 2 m higher than its inner edge. Calculate for what velocity the road is banked?

A

`sqrt(10) m//s`

B

`sqrt(14.7) m//s`

C

`sqrt(9.8) m//s`

D

None of these

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(b)
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