A wet porous subtance in the open air loses its moisture at a rate proportional to the moisture content. If a sheet hung in the wind loses half its moisture during the first hour, then the time when it would have lost 99.9% of its moisture is (wether conditions remaining same)

Options

A. more than 100 h
B. more than 10 h
C. approximately 10 h
D. None of these

Answer

C