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A driver drove for 3 hours at a certain speed. if he drove 12 more miles at the same speed, the distance would be 132 miles. at what speed did he drive?

Respuesta :

Answer:

40mph

Explanation:

1st leg DATA:

time = 3 hrs ; speed = r mph ; distance = 3r miles

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2nd leg DATA:

speed = r mph ; distance = 12 miles

 

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3r + 12 = 132

3r = 120

rate = 40 mph

Answer:

40mph

Explanation:

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