Question

# A certain freezing process requires that room temperature be lowered from $40°C$ at the rate of $5°C$ every hour. What will be the room temperature $10$ hours after the process begins?

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Solution

## From the given data we get to know that:$Initialtemperature=40°C$$Changeintemperatureperhour=-5°C$$Changeintemperatureafter10hours=\left(-5\right)×10=-50°C$$Finaltemperature=40ºC+\left(-50ºC\right)=-10°C$Hence, $thefinalroomtemperatureafter10hoursoffreezingprocess=-{10}^{o}C$.

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