Question 317026
At 5pm, Jill leaves New York City and travels toward Boston at an average rate of 56 miles per hour. At 6pm, Billy leaves Boston and travels toward New York, on the same road as Jill, at an average rate of 50 miles per hour. If they were initially 215 miles apart, at what time do Billy an Jill pass each other?

Jill 5.00 pm new york 56 mph
before Billy leaves Boston Jill has traveled 56 miles. He has reached point A
..
Billy's speed = 50 mph.
let them meet at a distance of x miles from Boston
..
Billy will travel distance x 
speed = 50 mph
time taken = x/50 hours.
..
In the same time Jill has traveled 215-x-56
Jill has traveled 159-x miles
speed = 56 mph
time = 159-x/56  hours.

x/50 = 159-x / 56
56x=50(159-x)
56x=7950-50x
106x=7950
x=75 distance traveled by Billy 
His speed was 56 mph
he took 75/56 hours
= 1.34 hours

at 7.20 pm