Question

The temperature at 12 noon was 10 degree celsius above the temperature at 12 noon was 10 degree Celsius AVN zero if it decreases at the rate of 12 degree Celsius per hour until midnight at what time would the temperature be 8 degree Celsius below zero for would be the temperature at midnight ???​

Answer 1

Question:-

The temperature at 12 noon was 10 degree celsius above the temperature at 12 noon was 10 degree Celsius AVN zero if it decreases at the rate of 12 degree Celsius per hour until midnight at what time would the temperature be 8 degree Celsius below zero for would be the temperature at midnight ???

Solution:-

At 12 noon, the temperature = 10° C above zero

The temperature is decreasing at 2° C per hour

8° C below zero = - 8° C

So, total fall in temperature from 10° C to 0° C and from 0° C to - 8° C = 18° C

Since the temperature falls 2° C in every one hour.

Therefore, to decrease 18° C, time taken = 18/2

= 9 hours

Present time is 12 noon so, the time when the temperature is - 8° C

= 12 noon + 9 hours

So, The time at which the temperature will be - 8° C = 9 PM

At 9 PM, the temperature is - 8° C, the temperature at 12 midnight will be =

(- 8° C) + (- 2° C × 3 hours)

= (- 8° C) + (- 6° C)

= - 14° C

So, at 12 midnight the temperature will be - 14° C.

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Answer 2

Answer: 14 degree below zero

Step-by-step explanation: