The length of a rectangular floor is more than its breadth by 200%. If Rs.484 is required to paint the floor at the rate of Rs.3/sq m, what would be the length of the floor?
Pick:  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 = 484/3 = 161.33 sq m   l b = 161.33 i.e., l * l/3 = 161.33   l^2 = 484 =&gt; l = 22.   22
<result>D</result>
The length of a rectangular floor is more than its breadth by 200%. If Rs.484 is required to paint the floor at the rate of Rs.3/sq m, what would be the length of the floor?