Question

Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling 80 mph and train B is traveling at 90 mph. Train A passes a station at 5:20 pm. If train B passes the same station at 5:50 pm, at what time will train B catch up to train A?

Answer 1

This is one of those questions who gets on my nerves!

Answer 2

lol yulp me too!!

Answer 3

This is one of the two questions which i cant do in the whole course.

Answer 4

d=vt where d is the remaining distance between trains.
for train A: d=80t
for train B: d=90(t-30)
80t=90(t-30)
2700=10t
t=270 mins (from 5:20)
so 7:50

Answer 5

is that am or pm?

Answer 6

pm

Answer 7

sorry 9:50

Answer 8

9:50 pm... thank you :D

Answer 9

so train B is 30 minutes behind train A.

0.5 * 90 = 45 miles.

at the relative speed of 10 mph, how long will it take to cover 45 miles?

4.5 hours, so train B will catch up at 9:50 pm,which is 270 minutes from 5:20