Two planes leave from Topeka, Kansas. The first plane travels east at a rate of 278 mph. The second plane travels west at a speed of 310 mph. How long will it take for them to be 1176 miles apart?

2 hours
4 hours
6 hours
8 hours

Question

Two planes leave from Topeka, Kansas. The first plane travels east at a rate of 278 mph. The second plane travels west at a speed of 310 mph. How long will it take for them to be 1176 miles apart?

2 hours
    4 hours
    6 hours
    8 hours

anonymous · Answer

in 1 hour both travel (278+310)m=588m
to travel 558m, they need 1 hr
to travel 1176m, they need 1176/588 hrs =  2 hrs

anonymous · Answer

r t = d
278 t + 310 t = 1176
t = 2 hours