幸福小区里有个惠民超市,超市从里面量长8米,宽5.6米,高3米,门窗面积共5.2平方米,超市收银台旁有一个长6分米,宽5分米,高4分米的长方体鱼缸,新冠肺炎疫情得到控制后,今年2月,超市进行重新装修;超市的四壁和房顶贴上了新的墙纸,鱼缸(无盖)的棱上贴上了装饰条儿,鱼缸里还放了美丽的珊瑚……
(1)装修时至少用了多大面积的墙纸(门窗不贴墙纸)?
(2)往鱼缸注入75升水,水深大约是多少厘米?
(3)放入珊瑚后,鱼缸里的水位上升了3厘米,那么珊瑚的体积是多少立方分米?
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