A cylinder of gas has height 48 inches,and the base has radius 2 feet问 volume of the cylinder 和 surface area of the cylinder 那个大 （1feet = 12inches）答案是表面积大,但是如果单位都换成inch 的话 不是体积大么?到底怎

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Acylinderofgashasheight48inches,andthebasehasradius2feet问volumeofthecylinder和surfaceareaofthecylinde

A cylinder of gas has height 48 inches,and the base has radius 2 feet问 volume of the cylinder 和 surface area of the cylinder 那个大 （1feet = 12inches）答案是表面积大,但是如果单位都换成inch 的话 不是体积大么?到底怎
A cylinder of gas has height 48 inches,and the base has radius 2 feet
问 volume of the cylinder 和 surface area of the cylinder 那个大 （1feet = 12inches）
答案是表面积大,但是如果单位都换成inch 的话 不是体积大么?
到底怎么算?

A cylinder of gas has height 48 inches,and the base has radius 2 feet问 volume of the cylinder 和 surface area of the cylinder 那个大 （1feet = 12inches）答案是表面积大,但是如果单位都换成inch 的话 不是体积大么?到底怎
统一单位：底面半径R=2feet=24inches
面积S=2πRh+2πR^2=2*24*48π+2*24*24*π=3456π (in^2)= 2.23π (m^2)
体积V=h*πR^2=48*24*24*π=27648π （in^3）=0.453π（m^3）
1平方英寸（in^2）=6.452平方厘米（cm^2）
1立方英寸（in^3）=16.3871立方厘米（cm^3)
此处关键在于单位.
国际单位制的基本单位为米（m）、千克（kg）、秒（s）、安培（A）、开尔文（K）、摩尔（mol）和坎德拉（cd）.PS：高中物理知识哈!应该没忘掉吧!
统一为国际单位才能够进行比较!

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