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) $r = 342 \mathrm { ft }$

Question

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) $r = 342 \mathrm { ft }$

Quizplus · Accepted Answer

The Answer of 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) $r = 342 \mathrm { ft }$

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

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