Courtneyconkel33
contestada

The stopping distance d of an automobile is directly proportional to the square of its speed s.
On one road, a car requires 75 feet to stop from a speed of 30 miles per hour. How many feet
does the car require to stop from a speed of 48 miles per hour on the same road?

Respuesta :

billgkgk

Answer:

192 feet is the stopping distance at 48 mph.

Step-by-step explanation:

Set up the proportion     [tex]\frac{x}{75} =\frac{48^{2} }{30^{2} }[/tex]    

x/75 = 2304/900   cross multiply  to get 900x = 172800

172800 ÷ 900 = 192

x = 192

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