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?

Given :

Initial Room temperature $=$ 40°C.

Rate of decrease of temperature $=$ 5°C per hour.

To do :

We have to find the room temperature after 10 hours.

Solution :

Temperature decreased in 1 hour $=$ 5°C

Temperature decreased in 10 hours $= 10 \times 5°C = 50°C$.

Therefore,

The temperature of the room after 10 hours $= Initial temperature - decrease in temperature$

$= 40°C - 50°C$

$= -(50-40)°C$

$= -10°C$.

Therefore, the room temperature after 10 hours will be $-10°C$.

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Updated on: 10-Oct-2022

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