Indomethacin (an anti-inflammatory drug, MW=357.79) is to be delivered by a surgically implanted drug-delivery device in which the drug inside a membrane reservoir transfers through the membrane to the surrounding fluid and tissue. The outside surface area of the reservoir is 3.5 cm². Furthermore, the concentration of the drug on the outside surface of the reservoir is 5.8 × 10⁻⁵ gmol/L, but the concentration a few centimeters from the reservoir can be assumed to equal 0. The fluid outside the reservoir is flowing slowly, which aids the transfer, and the mass-transfer coefficient is 0.016 cm/s. How much time will be required to deliver 50 mg of the drug?