1.

An inverted frustum (truncated cone) is mounted on a hemisphere of radius R. Height of the frustum is h with an opening of radius r. The vessel is filled with water. If the rate of evaportion of the liquid is proportional (constant of proportionality k gt 0) to the surface area of water in contact with air, find the time is which the vessel will be amptied.

Answer»


ANSWER :`(h+R)/(K)`


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