Posted by **Destinyyy** on Sunday, February 13, 2011 at 8:15pm.

the temperature of a 10m long metal bar is 15 degrees celcius at one end and 30 degrees celcius on the other end. Assuming that the temperature increases linearly from the cooler end to the hotter end, what is the average temperature of the bar? Also, explain why at least one place on the bar must hae this temperature.

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