# The temperature change of an object in a fixed temp room

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Let y represent the temperature in fahrenheit of an object in a room whose temperature is kept at a constant 60 degrees. If the object cools from 100 degrees to 90 degrees in 10 minute, how long will it take for its temperature to decrease to 80 degrees?

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##### Solution Summary

The solution helps you to find the rate of change in object temperature in a fixed temperature room.

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Let u be the change of temp of the object, so u= Y-60. Then by Newton's cooling law, ...

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