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15问答网 > 有一个直径是40米的圆形水池,它的占地面积是多少？如在它的周围栽树，每隔6.28米栽一颗，一共可栽多少棵？

有一个直径是40米的圆形水池,它的占地面积是多少？如在它的周围栽树，每隔6.28米栽一颗，一共可栽多少棵？

2025-03-31 08:43:55

推荐回答（2个）

回答1：

面积：S=20*20*3.14=1256m^2
周长：L=2*20*3.14=125.6
栽树125.6/6.28+1=21

回答2：

S=3.14\(40/2)'2=1214,C=3.14\40=121.4,121.4/6.28=20

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