Jim drove 300 miles away from home. He stopped 2/3 of the way there. He drove 4 hours. In miles per hour, what was his average speed?
r = d/t = 300mi/4h = 75 mi/h.
To find Jim's average speed in miles per hour, we need to determine the total time he spent driving and divide the total distance covered by that time.
First, let's calculate the distance Jim traveled before stopping by finding 2/3 of the total distance he drove:
2/3 * 300 miles = 200 miles
Now, we can calculate the average speed by dividing the total distance by the total time spent driving:
Average speed = Total distance / Total time
Since Jim drove 300 miles and spent 4 hours driving, we can substitute these values into the formula:
Average speed = 300 miles / 4 hours
Dividing these values will give us Jim's average speed in miles per hour:
Average speed = 75 miles/hour
Therefore, Jim's average speed was 75 miles per hour.