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3 kg of ice and a 12-pack of ice-cold soda are placed in a 25" x 25" x 40" (outside dimensions)

Styrofoam^TM cooler with 1" thick sides. How long will its contents remain at 0° C if the outside is asweltering 35° C? Assume no condensation forms on the outside of the cooler. Ignore the effects of convection and conduction of the air inside.

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