close

標題:

help~`數學

發問:

help我諗d數學難題[要連答案] 係about容量和體積

最佳解答:

The volume and height of a right circular cone are 108π cm^3 and 9 cm respectively.Find its base radius. (1/3)πr^2h=108 π r^2h=324 9r^2=324 r=6 cm 2.一個soild有兩個體,上邊個係cone,下邊個係圓柱體。上邊個係cone slant height is 10cm.下邊個既圓柱體既高度係10cm,個wide係12cm,要計個total surface area of it(上邊個cone+埋下邊個圓柱體既total surface area)答案係679cm^2(答案係取至三位有效數字) surface area of cone = πrl =π*6*10 =60π surface area of 圓柱體 =2πrh+πr^2 =2π*6*10+36π =156π total surface area =60π+156π =216π =679cm^2

此文章來自奇摩知識+如有不便請留言告知

其他解答:FAD2A23AB937987B

arrow
arrow
    創作者介紹
    創作者 omckyyo 的頭像
    omckyyo

    omckyyo的部落格

    omckyyo 發表在 痞客邦 留言(0) 人氣()