Answer:
F = M V^2 / R centripetal force required to keep car in circle
F = μ M G force due to static friction
μ = V^2 / (R G) equating centripetal force to friction required
V = 65 km/hr = 65000 m / 3600 sec = 18.1 m/sec
μ = 18.1^2 / (91.4 * 9.80) = .37