Question 567872
towards east train - 10:15 ----40 mph

Towards Weat -----35 mph----12:15

in 2 hours East bound train would have traveled 80 miles before west bound train starts.

Distance they to be apart = 230. 
230-80 = 150 miles is the distance to be covered.

add up speeds 35+40 =75 mph

t=d/r

150/75 = 2 hours

they will be 230 miles apart at 2:15 pm.( 2hours after west bound trains leaves)