An algebra problem by Abhiroop Reddy
Algebra
Level
1
The temperature of the room at 12 noon is 10°C.If it decreases at the the rate of 2°C per hour.Then what will be temperature at 9 PM?
The answer is -8.
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The rate of temperature fall is 2°C per hour.
There are 9 hours to 9 PM, I.e, the temp. fall is 9×2=-18°C
Therefore, temp. at 9 PM is 10-18= − 8 ° C