At 3 A.M. the temperature was 13° below zero. By noon, it had risen to 32°. What was the average hourly increase in temperature?

At 3 A.M. the temperature was 13° below zero. By noon, it had risen to 32°. What was the average hourly increase in temperature?

A (19/9)°

B (19/6)°

C 5°

D 7.5°

Solution

Correct Answer: Option C

Total Difference = 32 - (-13) = 45

Average hourly increase = 45/9=5