at what angle should the circular road be banked so that a car running at 50 km per hour be safe to go round the circular from of 200m radius​

Mark brainliest please

answer is 5.5 degrees

Explanation:

Given,

Speed of car (v) = 50km/hr = 50×1000/60×60 m/s

Radius of circle (r) = 200m

Banking angle (θ) =?

we know ,

tanθ = v^2/rg

or , tanθ = (50×1000/60×60)^2/200×10 = 0.0965

∴ θ = tan-1(0.0965) = 5.5°

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length