✔ 最佳答案
圓柱體??
我當你係
首先要記住條式: volume of cylinder = π r ^ 2 X h
A) π (4inches)^2 X (5inches)
B) π (8cm)^2 X (10cm)
C) π (3.75feet)^2 X (8.5feet)
D) 因爲d = 2r, 拒係r既兩陪
π (6meters/3)^2 X (3meters)
E) 拒話要溫volume, 所以都係用o個條式
with a radius of 5 centimeters: r = 5cm
a height of 18 centimeters: h = 18cm
π (5cm)^2 X (18cm)
計數機你識點用喇褂???????XD
hope it helps ^^
2007-04-10 14:58:14 補充：
答案:A) π(16) X 5 = 80π = 251.327...inches = 251inches (cor. to 3 sig. fig.)B) 64π X 10 = 640π = 2010.619...cm = 2011cm (cor. to 3 sig. fig.)C) 14.0625π X 8.5 = 119.53125π ...feet = 375.518...feet= 376feet (cor. to 3 sig. fig.)
2007-04-10 14:58:29 補充：
D) **sorry打錯, it should be (6meters/2)**(3)^2 X 3= 9π X 3= 27π= 84.823...m= 84.8m (cor. to 3 sig. fig.)E) 25π X 18= 450π= 1413.716...cm= 1410cm (cor. to 3 sig. fig.)
