Question

Abigal found that she can drive 140 miles in 3 hours, including rest stops, on intersate highway. How long would it take her to drive the interstates from cleveland, ohio, to washington dc which is 350 miles?

Answer 1

7.5 hours

Explanation:

distance = rate * time (d=rt)

First we find her average rate, or speed:

• 140 miles = 3 hours * r
• r =
  `(140 miles)/(3 hours)` = 46.6666 miles/hour

Now we take that rate and use our second distance to find the time:

d = rt

t = d/r = 350 miles / 46.6666 miles/hour = 7.5 hours