In a solar pond, the absorption of solar energy can be modeled as heat generation and can be approximated by ė_gen = ė₀ e^-bx, where ė₀ is the rate of heat absorption at the top surface per unit volume and b is a constant. Obtain a relation for the total rate of heat generation in a water layer of surface area A and thickness L at the top of the pond.

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L 0 XV Radiation beam being absorbed Solar energy I 1 1 1 1 Solar pond