In a 200-mile trip, the first 50 miles were completed at 40 mph. If the average speed for the whole trip was 50 mph, what was the average speed in the last 150 miles?	Choose one:	A) 592/11 mph	B) 594/11 mph	C) 596/11 mph	D) 598/11 mph	E) 600/11 mph
The time to complete the first 50 miles was (50 miles / 40 mph) = (5/4) hours.   The time to complete the whole trip was (200 miles / 50 mph) = (4) hours.   The time to complete the last 150 miles was (4) - (5/4) = (11/4) hours.   The average speed in the last 150 miles was (150 miles / (11/4) hours) = 600/11 mph.   The answer is 600/11 mph.
<result>E</result>
In a 200-mile trip, the first 50 miles were completed at 40 mph. If the average speed for the whole trip was 50 mph, what was the average speed in the last 150 miles?