Hi guys !!!

 

I think something is missing !

 

Look, how ?

dh_a/dt = constant = k

integrating with limits we get :

h - h₀ = kt

h = h₀ + kn

Now, in the starting h₀ is 0.

So, h = kn [ for a ]

Similarly for b.

 

Now, some condition must be given for calculating value of k. It cannot be calculated as such.