Two trains are moving toward each other with speeds of 23 mph and 37 mph. How far apart are they before they pass each other?

Question

A. 60 miles
B. 30 miles
C. 6 miles
D. 3 miles
E. 2 miles
F. 1 mile

Answer 1

they're moving toward each other at 60 miles per hour - got it

please clarify

Answer 2

You need to specify a time before the encounter