Question

Two trains 420 miles apart are headed toward each other. Train A is traveling at 40 mi/hr and Train B at 30 mi/hr. How long will it take before they reach each other?

How long will it take before they reach each other?

Options are:
A-10.5 hours
B-14 hours
C-4.2 hours
D-6 hours

Answer 1

4.2 Hours

Answer 2

Thank You :)

Answer 3

Don't give direct answers. >.>

Answer 4

let 't' be the time for both a and b..
velocity A=(distance covered)/t; velocity B=(distance covered)/t;
distance of A + distance B =420
equate the two. 40t+30t=420
t=6 hours sweetheart