maths~1題=3=

(a)
Since
the height of P: the height of Q
=h1:h2
=3:2
the volume of P: the volume of Q
=h1^3:h2^3
=3^3:2^3
=27:8
the volume of P: the volume of R
=27:27-8
=27:19
(b)
Similarly
the curved area of P : the curved area of Q
=h1^2:h2^2
=3^2:2^2
=9:4
the curved area of P: the curved area of R
=9:9-4
=9:5

2007-06-17 03:57:13 補充：
你直接用R的高來計比失之於過急啦。其實P同R都不是相似立體﹐比例公式是用不上的。