Question

A certain freezing process requires that room temperature be lowered from 40celuis at the rate of 5celuis every hour.
What will be the room temperature 10 hours after the process begins?
Solution:-Temperature of the room in the beginning =40celius
Temperature after 1 hour
=40'C -1×5'C=40'C-50'C=10'C

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Answer 1

Step-by-step explanation:

The present room temperature = 40\degree C40°C

The room temperature decreasing every hour by rate of = 5\degree C5°C

The room temperature after 10 hours will be

= 40\degree C\ +\ 10\times\left(-5\degree C\right)40°C + 10×(−5°C)

= 40\degree C-50\degree C\40°C−50°C

= -10\degree C−10°C

so, the room temperature after 10 hour = -10\degree C−10°C

Answer 2

change in temperature=50C/hour Time =10 hours

So, in 10 hours the temperature would be decreased by 10×5=500C

Therefore, the final temperature =40−50=−100C