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secondary 4 | A Maths

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(I) Show that volume, Vcm^3 of object is given by V= 12(pie)(r) - 2/3 (pie)(r)^3

(II) Given that (r) can vary, find the value of (r) for which V has a stationary value.

(III) Calculate this stationary value of V and determine if the volume is a maximum or minimum.

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