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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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