Question

A certain freezing process requires that more temperature be lowered from 40°c at the rate of 5°c every hour, What will be the room temperature 15 hours after the process begins?
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Answer 1

Answer:

Step-by-step explanation:

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?

Solution

From the given data we get to know that

Initial temperature = 40°C

Change in temperature per hour = −5°C

Change in temperature after 10 hours = (−5) × 15 = −50°C

Final temperature = 40ºC + (−75ºC) = −10°C

Answer

∴The final room temperature after 15 hours of freezing process == -oC

Answer 2

initial temperature = 40°cRate of change in temperature = 5°c/hourtime = 15hoursSo, in 15hours the temp would be decreasedby 15×5= 75°cSo, final temperature = 40−75°= 35°c