Solve the problem.An airplane leaves Los Angeles for Denver at a speed of 430 mph. Thirty minutes later, a plane going from Denver to Los Angeles leaves Denver, which is 850 miles from Los Angeles, at a speed of 510 mph. When they meet, how far are they from Denver?

A. 120 mi
B. 345 mi
C. 300 mi
D. 60 mi


Answer: B

Mathematics

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