Question

Solve the following A certain freezing process requires that room temperature be lowered from 60°C at the rate of 4°C every hour. What will be the room temperature 18 hours after the process begins? ​

Answer 1

Answer:

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 now add 8.

Step-by-step explanation:

Answer 2

Answer:

Room temperature = 60°C

Change in temperature per hour = 4°C

Temperature after n hours = (60-4n)°C

Temperature after 18 hours =(60-4×18)°C

=(60-72)°C = 12°C

✅ Hence,the room temperature will be -12°C after 18 hours.