Please answer the following question by reasoning step-by-step.
James drives 30 mph for half an hour and then twice as long for twice the speed. How far did he drive in total?

75
His first drive was 30 *.

5 = 15 miles.

The next leg was.

5 * 2 = 1 hour.

The speed of the trip was 30 * 2 = 60 mph.

So he drove 60 * 1 = 60 miles.

So in total he drove 60 + 15 = 75 miles.

.

Final answer: 75