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小 發表於 2016-12-8 11:57 AM (第 2690 天)
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(c) (i) length of base = 2(25)*(1+1/3) = 200/3 cm
height of pyramid = 25*(1+2/3)*6 = 200 cm
(ii) volume of pyramid = 1/3*(200/3)^2 * 200 =
8000000/27=296296.2963
Volume of plastic block and epoxy resin = 50^3(1-(27/64)^7)/(1-27/64)+80000 =295701.9656 < 296296.2963
so it will not overflow
[ 本帖最後由 數痴夢王 於 2016-12-23 07:13 AM 編輯 ]