问题
解答题
一个圆锥与一个圆柱的底面积与体积分别相等，圆柱的高是9厘米，圆锥的高是（ ）
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答案
因为V圆锥=
Sh，V圆柱=SH，1 3
所以V圆锥÷S=
h，V圆柱÷s=H，1 3
又因为V圆锥=V圆柱，s=s，
所以圆锥的高是圆柱的3倍，
圆柱的高是9厘米，圆锥的高：9×3=27（厘米）．
故选：B．
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一个圆锥与一个圆柱的底面积与体积分别相等，圆柱的高是9厘米，圆锥的高是（ ）
|
因为V圆锥=
Sh，V圆柱=SH，1 3
所以V圆锥÷S=
h，V圆柱÷s=H，1 3
又因为V圆锥=V圆柱，s=s，
所以圆锥的高是圆柱的3倍，
圆柱的高是9厘米，圆锥的高：9×3=27（厘米）．
故选：B．
| 从方框中选择正确选项，完成下面的对话。（其中有两项多余） A: Hello, Uncle John! B: Hello, Bob! 1____You look worried and upset. A: 2 I really need your help. B: What do you mean? A: Well, 3 But now my homework becomes more and more difficult since I am in Grade Three. My parents don't allow me to play basketball. B: Maybe your parents are right. 4 A: I see.I do well in all my lessons and I think I should be allowed to do the things that I'm interested in. B: OK. 5 A: Thank you, Uncle John. It's very kind of you. | |
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