Question

My friend told me I got this wrong, so i decided to come on here, can someone enlighten me?

Answer 1

To find their speeds, you have to make them per hour instead of c hours.

You would divide each by their times, so $\frac{280}{3.5}$ and $\frac{616}{7}$

Train A's speed turns out to be 80 mph and Train B's is 88 mph

train B is faster.

Idk why you got it "wrong," I can't see your work, but I'm pretty sure this is how you'd do it :))

Answer 2

Train A is traveling at 280 miles per 3.5 miles and Train B is traveling at 616 miles per 7 hours so you make both equal 7 hours so train A would be traveling 560 miles per 7 hours because 280+280=560 and 3.5+3.5=7 hours so train B is traveling faster