Mary passed a certain gas station on a highway while traveling west at a constant speed of 50 miles per hour. Then, 15 minutes later, Paul passed the same gas station while traveling west at a constant speed of 80 miles per hour. If both drivers maintained their speeds and both remained on the highway for at least 2 hours, how long after he passed the gas station did Paul catch up with Mary?	Choose the most appropriate option
A) 35
B) 15
C) 20
D) 25
E) 30
d = rt   M: r = 50mph, t = t + 1/4hr   d = 50 (t + 1/4)   P: r = 80, t = t   d = 80t   since they went the same distance:   50t + 50/4 = 80t   30t = 50/4 = 50/120 *60= 
<gadget id="calculator">50/120 *60</gadget>
<output>25</output>
25 min   t= 25 min   25
<result>D</result>
Mary passed a certain gas station on a highway while traveling west at a constant speed of 50 miles per hour. Then, 15 minutes later, Paul passed the same gas station while traveling west at a constant speed of 80 miles per hour. If both drivers maintained their speeds and both remained on the highway for at least 2 hours, how long after he passed the gas station did Paul catch up with Mary?