Cooper drove his car for 2 hours at a constant speed of 60 miles per hour and then for another 30 minutes at a constant speed of 40 miles per hour. how far did cooper drive?

2 hours x 60 miles per hour = 120 miles

30 minutes = 1/2 an hour

40 miles per hour x 1/2 hour = 20 miles.

120 miles + 20 miles = 140 miles total.

Let's split the problem into 2.

First, we know Cooper drives the first 2 hours at 60 mph, or 60 miles per hour. This means that in the first 2 hours of driving, Cooper drives 120 miles, since 2 times 60 is 120.

Second, He drives 30 more minutes at 40 mph. Since we know that 30 minutes is half of an hour, since 60 divided by 2 is 30, we can do the same thing to the 40 and get that the last 30 minutes of driving is 20 miles.

After adding the 120 and the 20, we come to the conclusion that Cooper drives 140 miles in the 2 and a half hours that he has driven.

Hope this helps.