Posted by **Shin** on Saturday, April 30, 2011 at 9:50am.

Highwq curves. If a circular curve without any banking has a radius of R feet, the speed limit L in miles per hour is L = 1.5 aqrt(R)

(a) Find the speed limit for a curve having a radius of 400 feet.

(b). If the radius of a curve doubles, what happens to the speed limit?

(c.) A curve with a 40-mile-per-hour speed limit is being designed .What should be its radius?

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