Question

If a car passes mile-marker 30 in 4 hours and mile-marker 120 in 5 hours, how many

miles per hour is the car traveling?

Answer 1

Answer: 90 mph

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Step-by-step explanation:

Subtract the mile marker values to find the distance traveled. Think of it like markers on a number line. Though in reality the road is likely curved in many ways.

Going from marker 30 to marker 120 is a distance of 120-30 = 90 miles.

This happens in 5-4 = 1 hour, so,

speed = distance/time = 90/1 = 90 miles per hour