The slant height of a cone is fixed at ...

The slant height of a cone is fixed at 7 cm if the rate of increase of its height is 0.3 cm / sec then the rate of increase of its volume when its heights is 4 cm is

`(pi)/(2)` cm/sec

`pi` cm/sec

`(pi)/(5)` cm/ sec

`(pi)/(10)` cm/sec

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MODERN PUBLICATION-MOCK TEST PAPER -IV-SELECT THE CORRECT ANSWER

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