Question

A certain freezing process requires that room temperature be lowered from 40°C at the rate of 5°C every hour. A certain freezing process requires that room temperature be lowered from 40°C at the rate of 5°C every hour​

Answer 1

Answer:

10°C

Step-by-step explanation:

Temperature reduced in 1 hr=5°C

therefore temp.reduced in 6 hrs=30°C

Therefore actual temp. after 6 hrs= (40-30)°C=10°

Answer 2

Proper 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 process again?

Answer:

-10°C

Step-by-step explanation:

Let us take the lowered temperature as negative,

Initial temperature= 40°C

Change in the temperature per hour= -5°C

Change in the temperature after 10 hours

$= ( - 5) \times 10 \\ = - 50°C$

Therefore, the final room temperature after 10 hours of freezing process

$= 40°C + ( - 50°C) \\ = - 10°C$