Water gained heat at the rate of 12° Celsius per minute for 5 minutes. It was then allowed to lose heat at 4° Celsius per minute. If the temperature before heating was 22° Celsius, what was its temperature after 8 1/2 minutes?

Question

Reiny · Accepted Answer

start: 22° increase for 5 min: 5(12) = 60° temp after 5 min = 22+60 = 82° decrease for next 3.5 min = 3.5(4) = 14° so temp after 8.5 minutes = 82-14 = 68°

toto · Answer

i did not understand the working since it was low explanation

Evans · Answer

Where does 3.5minutes come from

keke · Answer

22% 5(12)=60 after 5 minutes