I am given $a$ and $b$ and the program should return the speed of evaporation(in percentages), if I know that the fluid from a tank evaporates to $a\%$ from the starting amount of the fluid, in $b$ months.
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I'm unfamiliar with the notion of "speed of evaporation (in percentage)". Could you please define it? – Aug 18 '20 at 21:15
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Sorry, English is not my native language.. evaporation rate of fluid expressed in percentage – untitled Aug 18 '20 at 21:51
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$a%$ is the amount evaporated (lost) or the amount remaining ? – G Cab Aug 18 '20 at 22:10
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the remaining amount – untitled Aug 18 '20 at 22:46
1 Answers
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HINT:
You have to define the law of evapouration.
Assuming a similar Newton's law of evaporative cooling.
$$ \dfrac{dy}{dt}=-k y \;, y=y_0 e^{-k t}$$
For given
$$y/y_0= 1-a/100, t= b$$
evaluate $k$ by taking logs.
Narasimham
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