Answer:
It decreased
Step-by-step explanation:
It decreased. Assuming that the temperature is 100 and it is now reduced by 60% then the temperature will be at 40 and if it increased by 80% then the final temp is 72. So it is 48% of the original temp.
HB would be 90 degrees
The answer is B ⇒
∵ v = π r² h
∴ r² =
∴ r =
∵ r = 10 ft and h = 15 ft
∴