Petrol?17. A certain process requires that room Temperature be lowered

1.	Petrol?17. A certain process requires that room Temperature be lowered from 40°C at the Rate of 5°Cevery hour. What will be the room temperature 10 hours after the Process begins?
Answer» ☯ INITIAL TEMPERATURE is 40° C. ☯ Rate of CHANGE in temperature is 5° C/hour ☯ Time is 10 hours ${ }$ $\:\:\:\:\:\:\:\:━━━━━━━━━━━━━━━━━━$ ${ }$ ${ }$ So, in 10 hours the temperature would be decreased by - ${ }$ $\:\:\:\:\:\:\:\::\:\Longrightarrow\sf\:{10\:\times\:5}$ ${ }$ $\:\:\:\:\:\:\:\::\:\Longrightarrow\sf\:{50°\:C}$ ${ }$ ${ }$ Therefore, the FINAL temperature : ${ }$ $\:\:\:\:\:\:\:\::\:\Longrightarrow\sf\:{40\:-\:50}$ ${ }$ $\:\:\:\:\:\:\:\::\:\Longrightarrow\:{\underline{\boxed{\frak{\pink{-10°C}}}}}\:\bigstar$ ${ }$ ${ }$ $\:\:\:\:\therefore\:{\underline{\sf{The\:Room\:temperatue\:is\:{\textsf{\textbf{-10°C}}}}}}.$ ${ }$ $\:\:\:\:\:\:\:\:\:\:━━━━━━━━━━━━━━━━━━$