Question

From midnight to 4:00 am, the temperature dropped 1.75°C each hour. If the temperature at 4:00 am was -16°C, what was the temperature at midnight?

Answer 1

Answer: -11 degrees Celsius

Explanation:

4:00 am = -16 degrees

You know that 4:00am is four hours after midnight and you know that the temperature decreases by 1.75 degrees every hour so during that time it has dropped by:

1.75x4=7 degrees

Because it is -16 at 4:00am, you know it was 7 degrees higher at midnight

-16+7=-11

It was -11 degrees at midnight