A curved road of 50 m in radius is banked to correct angle for a given speed. If the speed is to be doubled keeping the same banking angle, the radius of curvature of the road should be changed to

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200 m

100 m

50 m

none of the above

answer is A.

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Detailed Solution

tan⁡θ=v2rg. Here v2r= constant or v12r1=v22r2 or r2=r1×V22V12or r2=50×2V12V12=50×4=200m

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