Question
<p>&lt;p&gt;The area of four walls of a
room is 120 cm&lt;sup&gt;2&lt;/sup&gt;. If the length and breadth of the room were equal and the height of the room is 5 cm, then what is the area of the floor?&lt;/p&gt;</p>Solution
<p><p>According to question, &nbsp;</p> <p>&nbsp; =&gt; l = b &nbsp; Area of the wall = 2(l + b) h &nbsp;</p> <p>=&gt; 120 = 2(l + l) &times; 5&nbsp; &nbsp;</p> <p>=&gt; 120 = 4 &times; l &times; 5 &nbsp;</p> <p>=&gt; l = 120/20 = 6 cm</p> <p>&nbsp; Area of the floor = l &times; b = 6 &times; 6 = 36 cm<sup>2</sup>&nbsp;</p></p>
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