(adsbygoogle = window.adsbygoogle || []).push({}); Marathon Runner Weight????

I have looked at the following problem and don't see how the weight of runner comes into play. I have solved the problem and my answer matches the one in the back of the book. What am I missing??

Problem

A marathon runner has the average metabolism rate of about 950kcal/h during a race. If the runner has a mass of 55kg, estimate how much water she would lose to evaporation from the skin for a race that lasts 2.5h.

My Solution

Heat = metabolism rate x hrs = 2375 kcal

Weight of water vaporized = Heat/Heat of Vaporation @ 20 C = 2375/585 = 4.1 kg = 4.1 liters

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# Homework Help: Marathon Runner Weight?

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