(1)养植园是个长方形,画在的图纸上,长10cm,宽3cm,这个养植园实际的长和宽各是多少米?
(2)养植园外形是一个半圆柱形(如图),半圆柱形外覆盖了一层塑料薄膜,需要多少平方米的塑料薄膜?
(3)利用如图中的阴影部分铁皮,刚好能做成一个园区内的圆柱形营养液蓄储桶(接口处忽略不计),这个营养液蓄储桶的容积是多少?
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2