90.4k views
12 votes
A tourist leaves Pittsburgh and travels 60 miles South on I-79 in 45 minutes. They exit after Wheeling and head west on I-70 and drive an additional 100 miles in 1 hour and 15 minutes. What is the tourist’s average speed?

User Ryekayo
by
8.1k points

1 Answer

10 votes

Answer:

The tourist's average speed was 80 mph

Step-by-step explanation:

Average Speed

If an object travels a distance d in a time t regardless of the direction, the average speed is the quotient of the distance over the time:


\displaystyle v=(d)/(t)

The tourist leaves Pittsburgh and travels 60 miles South in 45 minutes. Then he heads West and travels 100 miles in 1 hour and 15 minutes.

The total distance traveled is:

d = 60 miles + 100 miles = 160 miles

The total time is:

t = 45 minutes + 1 hour + 15 minutes = 2 hours

The average speed is:


\displaystyle v=(160)/(2)

v = 80 mph

The tourist's average speed was 80 mph

User Bob Vork
by
8.2k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.