The length of a rectangular floor is more thanits breadth by 200%. If Rs.324 is requiredto paint the floor at the rate of Rs.3/sq m, what would be the length of the floor? Pick one.
A) 12 B) 18 C) 20 D) 22 E) 24
Let the length and the breadth of the floor be l m and b m respectively.   l = b + 200% of b = l + 2b = 3b   Area of the floor = 324/3= 
<gadget id="calculator">324/3</gadget>
<output>108</output>
108 sq m   l b= 108 i.e., l * l/3 = 108   l2 = 324 =&gt; l = 18.   18
<result>B</result>
The length of a rectangular floor is more thanits breadth by 200%. If Rs.324 is requiredto paint the floor at the rate of Rs.3/sq m, what would be the length of the floor?