爸爸的杯子的内壁高18cm,内口径是7cm;妈妈杯子的内壁高14cm,内口径是6cm;小莉的杯子上面小,下面大,但相差不大,可以看成近似的圆柱形。杯子的内壁高9cm,上面的内口径是5.7cm,下面的内口径是6.5cm,内口径就取6cm。请你帮小莉算出一天中他们各需要喝多少杯水。(得数保留整数)
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