Hi I'm doing a practice paper for a past mathematical modelling exam. I've attached the problem What I'm having trouble with is simplifying the equations and variables into a differential equation that is solvable with Euler's Method. What I have currently is the sqrt(h1-h2) in the equation which leads to an imaginary number so I don't think I have done it correctly. ( As h1<h2..I think the diagram is also misleading) If someone could help me out with getting the right equation I should(hopefully) be able to do the next part. Thanks I'm posting this is another forum as well, need help asap. P.S the second question doesnt need to be attached, it is: Use Euler's method to make a single step to predict the levels in both tanks after 5 seconds.