Sunday, December 2, 2012

Rational Number Word Problems Test, Question 2 by Jay Jay

2. In a cold storage chamber, the temperature drops 5.2C every 10 minutes. If the temperature is initially 19C, what is the temperature in the chamber after 1½ hours?


Important things we know : 

5.2°C down every 10 minutes. (x9 = 90 minutes)
1½ hours  90 Minutes (90 ÷ 10 = 9)
Temperature is 19°C


19°C - (5.2°C x 9)    = 19°C - 46.8°C
                                  = -27.8°C
Therefore, the temperature in the cold storage chamber after 1½ hours is, -27.8°C


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