Question

a certain freezing process requires that room temperature be lowered from 45°Cat the rate of 4°C per hour. what will be the room temperature 12 hour after process begins​

Answer 1

Answer:

• -3 °C will be the temperature of room after 12 hours .

Step-by-step explanation:

Given:-

• Present temperature of room = 45 °C
• Rate of decreasing temperature per hour = 4°C

To Find:-

• Temperature after 12 hours ?

Solution:-

As it is given that the present temperature of room is 45° C and the rate of decreasing temperature per hour is 4 °C .So we have to calculate the temperature of room after 12 hour .

➮ Decrease in temperature = 12 × 4

➮ Decrease in temperature = 48 ° C

Since, the decrease in temperature of the room is 48 °C

So the temperature of room after 12 hours will be = Present Temperature of Room - Decrease in temperature after 12 hours

⇛The temperature of room after 12 hours will be = 45°C - 48 °C

⇛The temperature of room after 12 hours will be = -3 ° C

• Hence, the temperature of room after 12 hours will be - 3 °C.

Answer 2

Given:-

• Initial Temperature = 45°C

• Rate of change in temperature = 4°C per hour

• Time = 12 hours

To Find:-

• Room temperature after 12 hour.

Solution:-

Temperature decreased in 12 hours

= 12 × 4

= 48°C

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Final Temperature = Initial Temperature - Decreased Temperature

• Final Temperature = 45°C - 48°C

• Final Temperature = -3°C

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Hence, The Room temperature after 12 hours will be -3°C.

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