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Q.

A circular curve of a highway is designed for traffic moving at 72 kmh-1. If the radius of the curved pathis 100 m, the correct angle of banking of the road should be

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a

tan-125

b

tan-135

c

tan-115

d

tan-114

answer is A.

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Detailed Solution

Given, v=72kmh-1=72×518 ms-1=20 ms-1R = 100 m∴  θ=tan-1v2Rg=tan-1400100×10=tan-125
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A circular curve of a highway is designed for traffic moving at 72 kmh-1. If the radius of the curved pathis 100 m, the correct angle of banking of the road should be