The length of a rectangular floor is more than its breadth by 200%. If Rs.441 is required to paint the floor at the rate of Rs.3/sq m, what would be the length of the floor?	Choose the correct choice:	A) 12	B) 18	C) 20	D) 21	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 = 441/3= 
<gadget id="calculator">441/3</gadget>
<output>147</output>
147 sq m   l b= 147i.e., l * l/3 = 147   l^2 = 441 =&gt; l = 21.   21
<result>D</result>
The length of a rectangular floor is more than its breadth by 200%. If Rs.441 is required to paint the floor at the rate of Rs.3/sq m, what would be the length of the floor?