Mathematics, 28.08.2020 17:01, kuuleiisrad

8. Two planes left Philadelphia traveling in opposite directions. Plane A left 15 minutes before plane B. After plane B had been flying for 1 hour, the planes were 860 miles apart. What were the speeds of the two planes if plane A was flying 40 miles per hour faster than plane B? (Hint: convert the 15 minutes to one-fourth of an hour before solving.)

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8. Two planes left Philadelphia traveling in opposite directions. Plane A left 15 minutes before pla...