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A sorage tank consists of a circular rylindr-with a bemighere surk on culthal diameter of the cylinder be \( 1.4 \mathrm { m } \) and is knogh be \( 8 \mathrm { m } \) find the costate in the on the outside at rate of \( 20 \mathrm { per } \mathrm { m } ^ { 2 } \).

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