A common drinking glass has circular cross-section that taper from a radius of 5 cm at the top of the glass to radius of 4 cm at the bottom. The glass is 15 cm high and full of water. Set up do not evaluate, to find the amount of work required to drink all the wat
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You have a frustum right, calculate the volume of that frustum.
Rate at which it can be emptied is the work done,
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