Jason ran for 1.5 hours with a 2 mph wind at his back. It took him 2.5 hours to get home with the same wind in his face. If he ran in the same manner and effort, how fast would Jason have run without the wind?

Question

anonymous · Answer

(1.5 hours)(x+2 mph) = d/2
(2.5 hours)(x-2 mph) = d/2
x = 8 mph
d/2 = 15 miles 
distance/speed = time

d =30, speed = 8mph

he would have ran for 3.75 hours with no wind

anonymous · Answer

Thank you! But that's not an option :/ 

a. 5 mph 	
 	b. 10 mph 	
 	c. 15 mph 	
 	d. 20 mph

those are my options.

anonymous · Answer

b