The current temperature is 54^circ F. It is expected rise 2.5^circ F each hour. In how many hours will the temperature be 84^circ F?

1 Answer
Lucy
May 30, 2018

12

Explanation:

Let the number of hours be H

Hence your equation is 54+2.5H = 84

What the equation is basically saying is that you have an initial temperature of 54 and since you add 2.5 to each hour, 2.5H means that the unknown number of 2.5 is added one after the other (2.5+2.5+2.5+...) until the temperature amounts to 84

54+2.5H=84

2.5H=30

H=12

Therefore, the number of hours required is 12

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