1.

Water is being poured into a vessel, in the form of an inverted right circular cone of semi-vertical angle 45^(@), in sucha way that the rate of change of volume at any time is proportional to the area of the curved surface which is wet at that time. Intially, the vessel is full to a height to 2 cm and after 2 seconds, the height is 10 cm. After 3.5 seconds, the height is

Answer»

18 cm
16 cm
14 cm
12 cm

Answer :B


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