The first half of a 500-mile trip was travelled in x hours and the second half in y hours. Which of the following is equal	to the average speed, in miles per hour, for the entire trip?
Choose the correct choice from the following options
A) 250/(x + y)  B) 500/(x + y)  C) 50/x + 50/y  D) 250/x + 250/y  E) 500/x + 500/y
Time taken to cover first half i.e 250 miles of a 500 mile trip = x   time taken to cover the second half i.e 250 miles of a 500 mile trip = y   Total time taken = x+y   Average speed for the entire trip =total distance /total time   =500/(x+y)   Answer 500/(x + y)
<result>B</result>
The first half of a 500-mile trip was travelled in x hours and the second half in y hours. Which of the following is equal	to the average speed, in miles per hour, for the entire trip?