1.
The volume and height of a right circular cone are
108(pie)cm^3 and 9 cm respectively.Find its base
radius.
答案要(取至3位有效數字)
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)
plz help!