Question

the temperature at 12 noon was 10celcius above zero . at what time the temperature will be at 8 celcius . if if it decrease at the rate of 2 celcius per hour till midnight what would be the temperature at midnight ?

Answer 1

$\small\underline{Question}$

1 . Find the time when temperature is - 8 degree Celsius ?

2. Find the temperature at midnight?

$\small\underline{given}$

Temperature at 12 noon is 10 degree Celsius.

It decreases 2 degree per hour .

$\small\underline{Answer}$

1. The time when the temperature is -8 degree is

9 pm.

2. The temperature at midnight is -14 degree Celsius.

$\small\underline{Explanation}$

1. If the temperature is 10 degree at 12 pm and it decreases by 2 degree Celsius. Then at 5 pm it will be 0 degree Celsius. At 7 it will be -4 degree and at 9 pm it will be - 8 degree Celsius.

2. If at 9 pm it is - 8 degree Celsius the at 11 pm it will be 12 degree Celsius. As after every 1 hour it decreases at a rate of 2 degree Celsius. Then at midnight it will be -14 degree Celsius.