Question

A certain freezing process requires that room temperature be lowered from 30degree Celsius at the rate of 4 degree Celsius every hour. What will be the room temperature 15hours after the process begins?

Answer 1

Answer: -30°C

Step-by-step explanation:

Measure by which room temperature is lowered every hour = 4°C

∴Measure by which room temperature will be lowered after 15 hours= 4 x 15°C

                                                                                                                  = 60°C

Since, starting room temperature was 30°C and the temperature of the room will be decreased by 60°C after 15 hours, the temperature of the room 15 hours after the process begins = 30 - 60 °C

                                                   = -30°C