Question

A certain freezing process requires that a room temperature be lowered from 40*C at the rate of 5*C per hour. What will be the room temperature 12 hours after the process begins

Answer 1

Answer:

-20 degrees Celsius

Step-by-step explanation:

Freezing point at start of process= 40 degrees Celsius

Rate of decrease per hour= 5 degrees Celsius

Temperature of the room in 12 hours= ?

= 40 - 5 = 35

=35-5= 30

30- 5= 25

25-5= 20

20-5= 15

15-5 = 10

10-5=5

5-5= 0

0-5= -5

-5 - 5= -10

-10 - 5= -15

-15-5= -20

Therefore, the room will be -20 degrees Celsius in 12 hours.