Question

A certain freezing process requires that the room temperature be lowered from
80° at the rate of 6° C every hour. What will be the room temperature 9 hours
after the process begins.​

Answer 1

Current temperature of a room = 80°C

The temperature that is decreased after every hour = 6°C

The temperature that is decreased after 9 hours :-

$= \texttt{6 \: × \: 9}$

$= \color{hotpink} \texttt{ 54}°\texttt{C}$

So, temperature that will be decreased after 9 hours = 54°C

Temperature of the room after 9 hours :-

$= \texttt{80 - 54}$

$=\color{hotpink} \texttt{26}°\texttt{C}$

Therefore, the temperature of the room 9 hours after the process has began = 26°C