Consider a rainfall tank with a hole in the bottom. The change in volume is modelled by dV/dt = fin -  fout Volume, V (in Litres). Flow rate in, fin (L/hour). Flow rate out, fout (L/hour). Initially, tank has 50L of water, V(0) = 50 a) Assume rain is getting heavier, such that fin(t) = 10 + t and tank looses 10% of V/hour, such that fout = 0.1V. By direct substitution check that function V(t) = 10(t - 5e-0.1t) satifies the ODE and initial condition. b) Assume hole is getting larger so flow rate out is increasing. fout(V, t) = 0.1(1+0.1t)V. Solve ordinary differential equation for V(t) with this fout. Please use integrating factor method for this step and include initial condition.

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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Consider a rainfall tank with a hole in the bottom. The change in volume is modelled by dV/dt = fin -  fout

Volume, V (in Litres). Flow rate in, fin (L/hour). Flow rate out, fout (L/hour).

Initially, tank has 50L of water, V(0) = 50

a) Assume rain is getting heavier, such that fin(t) = 10 + t and tank looses 10% of V/hour, such that fout = 0.1V. By direct substitution check that function V(t) = 10(t - 5e-0.1t) satifies the ODE and initial condition.

b) Assume hole is getting larger so flow rate out is increasing. fout(V, t) = 0.1(1+0.1t)V. Solve ordinary differential equation for V(t) with this fout. Please use integrating factor method for this step and include initial condition.

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