Question

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`?

Answer 1

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