Jenny and Bella are planning a road trip. Their total distance is 381 miles. If they increase their average speed from 60 mph to 70 mph, what is the difference in the time spent in the car?

Question

Quizplus · Accepted Answer

Using the formula time = distance / speed, we can calculate the time spent in the car at the original speed of 60 mph:

time = 381 miles / 60 mph = 6.35 hours

To find the time spent in the car at the increased speed of 70 mph, we can use the same formula:

time = 381 miles / 70 mph = 5.44 hours

The difference in time is:

6.35 hours - 5.44 hours = 0.91 hours

To convert hours to minutes, we multiply by 60:

0.91 hours * 60 minutes/hour = 54.6 minutes

Therefore, the correct answer is C: Their time is decreased by 54.6 minutes.

Jenny and Bella Are Planning a Road Trip