Question 522551
ellen 12 mph
Kate 9 mph

Ellen reached early by 15 minutes=>1/4 hour

time kate-time Ellen = 1/4
t=d/r
x/9-x/12=1/4

multiply equation by the LCD 36
4x-3x=36/4
x=9 
d= 9
ellen speed = 12 mph
time = 9/12=>3/4 hours

So Ellen reached at 3.45 pm

m.ananth@hotmail.ca