Question 268162
This is an RTD question. Here is a table based on the given information
travel . . . . . . . .rate . . . . . . . . . . time . . . . . . . . . distance
to NYC . . . . . . .50. . . . . . . . . . . . x. . . . . . . . . . . . .50x
to Phila . . . . . . 40. . . . . . . . . . . . 3.6 - x. . . . . . . . 144 - 40x
total . . . . . . . . . . . . . . . . . . . . . . 3.6 . . . . . . . . . . . . . . 
since distance is the same, we get
50x = 144 - 40x
add 40x to get
90x = 144
divide to get
x = 1.6 hours to NYC