Question 976317


First,  let us find how many feet of the tower is painted orange  AND  is lined with stone bricks.  It is 


(25 + 14) - 30 = 39 - 30 = 9 feet.


Now,  let us find how many feet of the tower is painted orange  BUT  is  NOT  lined with stone bricks.  It is


25 - 9 = 16 feet.


<B>Answer</B>.  16  feet of the tower is painted orange &nbsp;BUT&nbsp; is &nbsp;NOT&nbsp; lined with stone bricks.


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<B>Comment from student</B>: hey why did you subtract 30 from 25 and 14 ?
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Good question, thank you.


Answer:  &nbsp;Because it is the length of the common part of the tube which is painted orange &nbsp;AND&nbsp; lined with stone bricks.


Make the sketch of the tube painted according to the condition, &nbsp;and you will get why it is so.