I Have A Math Question I Just can't get about rate of trains and collision.?

Question

Two trains are headed toward each other at rates of 80mph and 120mph respectively. How many miles apart ar they one minute before impact?

I tried to put it in Minutes and the rate per minutes but it was not working for me. Then i multiplied 80 * 120 but idk. I have been working on this for 40 minuters and need help!

thank you to all those math-savy people!

Answer 1

Their closing speed is 200 mph (120+80)

200 mi/hr x 1hr/60min = 3.333 mi/min

So they are 3.333 miles apart one minute before collusion.

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