An elite Tour de France cyclist can maintain an output power of 470 W during a...

Question:

An elite Tour de France cyclist can maintain an output power of 470 W during a sustained climb. At this output power, how long would it take an 84 kg cyclist (including the mass of his bike) to climb the famed 1100-m-high Alpe d'Huez mountain stage? Neglect any friction.

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