SOLUTION: A student tries to solve the problem:how long does it take a car to travel 240 miles if the car's rate is 60 mi/h? The student uses unit analysis to check problem. Which set of uni

Question 473746: A student tries to solve the problem:how long does it take a car to travel 240 miles if the car's rate is 60 mi/h? The student uses unit analysis to check problem. Which set of units is correct?
a. h over mi/h
b. mi/h over mi
c. mi over mi/h
d. mi/h over h
Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
this problem involves rate * time = distance.
rate is measured in miles per hour (m/h)
time is measured in hours (h)
distance is measured in miles (m).
unit analysis would show this equation as:
(m/h) * h = m
divide both sides of this equation by (m/h) to get:
h = m / (m/h)
that looks like selection c.

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