When B left, A was 30 miles ahead.
B is going 15 mi/hr faster than A.
So, how long does it take to make up the distance?
Train A left the station traveling 60 miles in 1 hour. 30 minutes later, train B left the same station traveling 75 miles in 1 hour. How many hours will it take for the two trains to meet up?
I know that a formula, D=V*T, might be useful while solving the equation. Thank you!
3 answers
I'm not sure what to do.
30/15=2 hours?
15/30=0.5 hours?
30/15=2 hours?
15/30=0.5 hours?
come on. If you have to go 30 miles, and you go 15 miles each hour, you must surely see that it will take two hours.
If you want to be sure, include the units:
(30 mi) / (15 mi/hr) = 30/15 hr = 2 hr
(15 mi/hr)/(30mi) = 0.5/hr
That means that you cover half the distance per hour. So, it will take 2 hours.
Try to do a sanity check when you are trying to get an answer. You do have some real-life experience to fall back on.
If you want to be sure, include the units:
(30 mi) / (15 mi/hr) = 30/15 hr = 2 hr
(15 mi/hr)/(30mi) = 0.5/hr
That means that you cover half the distance per hour. So, it will take 2 hours.
Try to do a sanity check when you are trying to get an answer. You do have some real-life experience to fall back on.