<PRE><B>Question 1199078</B>
.


Your error is that you use wrong value for the thickness &amp;nbsp;&quot; d &quot; &amp;nbsp;of the circular walkway.


According to the problem, &amp;nbsp;it is &amp;nbsp;3 inches (sic !), &amp;nbsp;which is &amp;nbsp;0.25 &amp;nbsp;of the foot.



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&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;1 foot = 12 inches


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So the correct value for &amp;nbsp;d &amp;nbsp;is &amp;nbsp;&amp;nbsp;d = 0.25 ft;  &amp;nbsp;&amp;nbsp;NOT &amp;nbsp;&amp;nbsp;d = 3 ft.




&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;They caught you in the trap, &amp;nbsp;using different measurement units . . . 




Happy calculations and re-calculations &amp;nbsp;(&amp;nbsp;!&amp;nbsp;)



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