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t. Fa fa fa 120° 1 (Water is dripping th...

t. Fa fa fa 120° 1 (Water is dripping through a tiny hole at the vertes in the bottom of a conical funnel at a uniform rate of 4 cm / sec. When the slant height of the water is 3 cm, find the rate of decrease of the slant height of the water, given that the vertical angle of the funnel is 120°.) I et radius of conical funnel is r сm and height is hcm.

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