Question

the temperature at 12 noon was 10 degree Celsius above zero if it increases at the rate of 2 degrees celsius per hour until midnight at what time would the temperature 8 degree Celsius below 0 what would be the temperature at midnight ​

Answer 1

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Answer 2

Every hour temperature decrease by 2\degree C2°C

Therefore the temperature decrease 2\degree C2°C = 1 hour

So the temperature decrease 1\degree C1°C = \frac{1}{2}\ hour

2

1

hour

So the temperature at 18\degree C18°C = \frac{1}{2}\times18\ \ =\ 9\ hours\

2

1

×18 = 9 hours

Total time = 12 hours + 9 hours

= 21 hours

= 9 pm

thus, at 9pm the temperature would be 8\degree C\ below\ 0\degree C8°C below 0°C