(Solved): A truncated cone 30cm high is constructed of aluminum. The diameter at the top is 7.5cm, and t ...

A truncated cone $$30\mathrm{cm}$$ high is constructed of aluminum. The diameter at the top is $$7.5\mathrm{cm}$$, and the diameter at the bottom is $$12.5\mathrm{cm}$$. The lower surface is maintained at $$93^{?}\mathrm{C}$$; the upper surface, at $$540^{?}\mathrm{C}$$. The other surface is insulated. Assuming onedimensional heat flow, what is the rate of heat transfer in watts? $$k$$ for aluminum is