Jawabanmu

2014-05-30T06:50:22+07:00
Dik diagonal bidang = 82
rumus diagonal bidang = x \sqrt{2}
x= rusuk
x \sqrt{2} = 82
x =82/ \sqrt{2}
x = 82/ \sqrt{2} dikali  \sqrt{2} /  \sqrt{2}
x = 41 \sqrt{2}

volume =  r^{3}
volume =  (41 \sqrt{2}) ^{3}
volume = 41 \sqrt{2} 41 \sqrt{2} 41 \sqrt{2}
volume =  3362 x  41 \sqrt{2}
volume = 137842  \sqrt{2}
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