AP:what is the radius of a cylindrical soda can with volume of 512 cubic inches that will usewhat is the radius of a cylindrical soda can with volume of 512 cubic inches that will use the minimum material?

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AP:what is the radius of a cylindrical soda can with volume of 512 cubic inches that will usewhat is the radius of a cylindrical soda can with volume of 512 cubic inches that will use the minimum material?
AP:what is the radius of a cylindrical soda can with volume of 512 cubic inches that will use
what is the radius of a cylindrical soda can with volume of 512 cubic inches that will use the minimum material?

AP:what is the radius of a cylindrical soda can with volume of 512 cubic inches that will usewhat is the radius of a cylindrical soda can with volume of 512 cubic inches that will use the minimum material?
V = pi*r^2*h = 512
A = 2*pi*r*h + 2*pi*r^2
h = 512/(pi*r^2)
A = 2*pi*r*512/(pi*r^2) + 2*pi*r^2 = 1024/r + 2*pi*r^2
dA/dr = -1024/r^2 + 4*pi*r = 0
r = 4.3554
还是要英文翻译?

要求用最少材料做成的圆柱形苏打水桶，能盛512立方英寸苏打水，求水桶最佳半径是多少？

问一个英语的数学问题：（请帮个忙~）下补充~The cost of similar bottles of milk is proportional to the volume.A bottle which has a radius of 36mm costs 75c.Question:a.What is the price (to the nearest cent)of the bottle with a radiu what is the date what is the meaning? What is the matter? what is the story What is the happiness? What is the love? what is the pencil what is the matter? what is the matter? what is the love? what is the fuck? What is the man? what is the hell what is the time what is the problem what is the trick? what is the mean?what is the mean?what is the mean?what is the mean?