Mr. Ishikawa left Houston at 3:00 P.M. and arrived in Dallas at 8:00 P.M., driving a distance of approximately 240 miles. During his trip, he took a one-hour dinner break. What was Mr. Ishikawa’s average speed?
It took Mr I 5 hours to drive 240 miles avg speed = 240 / 5 = 48 m /hr for the trip
If we look at ONLY the time he was actually driving, he drove 240 miles in 4 hours = 60 m/hr