The area of a rectangle plot is 460 square metres. If the length is 15% more than the breadth, what is the breadth of the plot? Choose the correct choice: A) 10m B) 20m C) 50m D) 40m E) 30m
lb = 460 m power2...(Equation 1)   Let the breadth = b   Then length, l = b × (100+15)/100 = 115b/100 ...(Equation 2)   From Equation 1 and Equation 2,   115b/100 × b = 460   b2 = 46000/115= 
<gadget id="calculator">46000/115</gadget>
<output>400</output>
400   ⇒ b= √400 = 20 m   Answer is 20m.
<result>B</result>
The area of a rectangle plot is 460 square metres. If the length is 15% more than the breadth, what is the breadth of the plot?