A bus trip of 280 miles would have taken 1 hour less if the average speed V for the trip had been greater by 5 miles per hour. What was the average speed V, in miles per hour, for the trip?
Select:	A) 35	B) 40	C) 45	D) 50	E) 55
The time is the distance/speed. The time difference is 1 hour.   280/V - 280/(V+5) = 1   280(V+5) - 280V = (V)(V+5)   1400 = (V)(V+5)   35*40 = (V)(V+5)   V = 35 mph   The answer is 35.
<result>A</result>
A bus trip of 280 miles would have taken 1 hour less if the average speed V for the trip had been greater by 5 miles per hour. What was the average speed V, in miles per hour, for the trip?