- (E) Since the water level rises more slowly as the cone fills, the rate of depth change is
decreasing, as in (C) and (E). However, at every instant the portion of the cone containing
water is similar to the entire cone; the volume is proportional to the cube of the depth of the
water. The rate of change of depth (the derivative) is therefore not linear, as in (C).
dmanu
(dmanu)
#1