[計量] 一題計量麻煩大家了???
Q: the inside dimensions of a rectangular wooden box are 6 inches by 8 inches
by 10 inches. A 圓柱狀的 cannister is to be placed inside the box so that it
stands upright when the closed box resets on one of its six faces. Of all such
cannisters that could be used, what is the radius, in inches, of the one that
has maximum volume??
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選項有 A.3 B.4 C.5 D.6 E.8 answer:B 不過我是算C~~可能是我誤會題意了
我是用帶答案進去了~~先算出長方體面有三種6*8=48 6*10=60 8*10=80
6*6*π 和 8*8*π都太大了所以刪掉了
3*3*π=28.26 選48的面 volume 28.26*10
4*4*π=50.24 選60的面 volume 50.24*8
5*5*π=78.5 選80的面 volume 78.5*6
所以這樣選5當半徑罐頭可以有最大 volume ---這樣算對嗎????
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