A Curved Road Will Accommodate Traffic Traveling S Mph If $s = 3 \sqrt { r }$

question 222

Multiple Choice

A curved road will accommodate traffic traveling s mph if the radius of the curve is r feet, according to the formula $s = 3 \sqrt { r }$ . If engineers expect 55-mph traffic, what radius should they specify? Give the result to the nearest foot.

• A) \(r = 345 \mathrm { f }\)
• B) \(r = 339 \mathrm { f }\)
• C) \(r = 351 \mathrm { ft }\)
• D) \(r = 336 \mathrm { t }\)
• E) \(r = 342 \mathrm { ft }\)

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