The length of a rectangular floor is more than its breadth by 200%. If Rs.361 is required to paint the floor at the rate of Rs.3/sq m, what would be the length of the floor?
Select the correct option.
A) 18 B) 19 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 = 361/3 = 120.33 sq m   l b = 120.33 i.e., l * l/3 = 120.33   l^2 = 361 =&gt; l = 19.   19
<result>B</result>
The length of a rectangular floor is more than its breadth by 200%. If Rs.361 is required to paint the floor at the rate of Rs.3/sq m, what would be the length of the floor?