Question

Section D 16. A certain freezing process requires that room temperature be lowered from 30°C at the rate of 4°C every hour. What will be the room temperature 12 hours after the process begi​

Answer 1

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