Question

The formula v = square root of (2.5r) models the safe maximum speed, v, in miles per hour, at which a car can travel on a curved road with radius of curvature, r, in feet. A highway crew measures the radius of curvature at an exit ramp as 160 feet. What is the maximum safe speed?

Answer 1

Substitute the given value of r into the formula:

v = sqrt(2.5r)

v = sqrt(2.5(160))

v = sqrt(400)

v = 20

Therefore, the maximum safe speed is 20 miles per hou

Explanation: