A cylindrical tank of height equal to twice the diameter of its base can hold 10 liters (1L=1000 c m 3 ) of water. another cylindrical container with the same capacity has its height equal to three times the diameter of its base. find the ratio of the amount of aluminum required for making the two containers, including the covers.

Question

A cylindrical tank of height equal to twice the diameter of its base can hold 10 liters (1L=1000 c      m    3  ) of water. another cylindrical container with the same capacity has its height equal to three times the diameter of its base. find the ratio of the amount of aluminum required for making the two containers, including the covers.

emerhelienapj · Accepted Answer

volume of cylinder =   π  ×      R    2    ×  Hsince H = 2D=4R10litres=   π  ×      R    2    ×  4  ×  Rrearranging:      2.5    π    =      R                  1        3            R= 9.267 cmsurface area =   2  (  e  n  d  s  )  ×  π  ×      R    2  Copyright ©2011-2012 CUI WEI. All Rights Reserved. + (circumference x height)similarly for the 3 x height  10  ÷  6  ÷  π  =      R          1      3

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