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In the figure,pyramid VPQRS is embedded in pyramid VABCD,where ABCD and PQRS are two similar rectangles.If the heights of the two pyramids are both 10cm,find the volume of the space between VABCD and VPQRS 圖片參考:http://imgcld.yimg.com/8/n/HA04937267/o/701105210107113873442120.jpg 更新: AD點解係12/8x5? 更新 2: = = 有無人知

最佳解答:

其實呢PQRS係1個長方形 而ABCD都係1個長方形 佢地之間係相似圖形 AD/PS=AB/PQ; AD/PS=1.5; 但係我地唔知個PS係咩 大減細: 12xADx10x(1/3)-8xPSx10x(1/3) =(12xAD-8xPS)x(10/3) =(12x1.5xPS-8xPS)x(10/3) =(10xPS)x(10/3) =(100PS/3)cm^3

其他解答:

這題題目好像欠了一個條件(例如 PS 或 AD 的長度),計算不到答案。|||||AD點解係12/8x5? 因為佢將 PS 的 S 看成 5。|||||wrong........... 2011-05-22 10:57:28 補充: Agree with sioieng,some information is missed|||||AD=12/8 X5 = 60/8cm so, the space: 12X60/8X10X1/3 - 8X5X10X1/3 =166 /2/3 cm3
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