Question

A certain freezing process requires that room temperature be lowered from 40°C at the rate of 5°C every hour. What will be the room temperature 10 hours after the process begins?

Answer 1

Given: Present room temperature = 40°C Decreasing the temperature every hour = 5°C Room temperature after 10 hours 

= 40°C + 10 x (–5°C ) = 40°C – 50°C = – 10°C

Thus, the room temperature after 10 hours is – 10°C after the process begins.