A home coming device left its home to deliver a message. On takeoff, the device encountered a tailwind of 9 mph and made the delivery in 15 minutes. The return trip into the win took 30 minutes. How fast the device fly in still air?
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Home » Mathematics » A home coming device left its home to deliver a message. On takeoff, the device encountered a tailwind of 9 mph and made the delivery in 15 minutes. The return trip into the win took 30 minutes. How fast the device fly in still air?