Question

Jane is baking cookies in an oven heated to 350°F. After the cookies are baked, she removes them from the oven and leaves them to cool in a room where the temperature is 75°F. The cookies cool to 300°F in 30 minutes. What will the temperature of the cookies be after an hour? Round your answer to the nearest whole number.

Answer 1

250°F

Explanation:

Assuming the temperature of the room will not change, first calculate the temperature drop in the first 30 minutes:

350 - 300 = 50

So in the first 30 minutes, the temperature dropped 50°F, to find the temperature of the cooking after an additional 30 minutes (making the total time an hour) simply subtract this value from the temperature:

300 - 50 = 250

Meaning the end temperature will be 250°F.

Hope this helps!