Question 594561
Length of train I = 230 ft.
length of second train = 210 ft.

Length of both trains = 230 +210 = 440 ft.
This is the distance to be traveled so that they cross each other completely.
1 mile = 5280 ft
440 ft = 440/5280 = 0.083 miles

..
The trains are moving towards each other. add up speeds

50 + 60 = 110 mph 

time = distance / speed

time = 44/528 * 1/110

Time = 1/1320 hours

= 1/1320 * 3600 
= 2.73 seconds
They wil take 2.73 second to cross each other