The length of a rectangular plot is thrice its breadth. If the area of the rectangular plot is 1323 sq m, then what is the breadth of the rectangular plot?  Select.
A) 11 B) 17 C) 18 D) 21 E) 1322
Let the breadth of the plot be b m.   Length of the plot = 3 b m   (3b)(b) = 1323   3b2 = 1323   b2 = 441 = 21 (b &gt; 0)   b = 21 m.   Answer: 21
<result>D</result>
The length of a rectangular plot is thrice its breadth. If the area of the rectangular plot is 1323 sq m, then what is the breadth of the rectangular plot?