The length, breadth and height of a room are in the ratio 4 : 4 : 2. If the breadth and height are halved while the length is doubled, then the total area of the four walls of the room will
Pick one.
A) (a) decrease by 37.5%	B) (b) decrease by 13.64%	C) (c) decrease by 15%	D) (d) decrease by 18.75%	E) (e) decrease by 30%
Length (L) = 4   Breadth (B) = 4   Height (H) = 2   Total Area of Walls = 2(BH + LH) = 2*(4*2 + 4*2) = 2*(8+8)= 
<gadget id="calculator">2*(8+8)</gadget>
<output>32</output>
32   Then, Finally   Length (L)= 2*4= 
<gadget id="calculator">2*4</gadget>
<output>8</output>
8   Breadth (B)= 4/2= 
<gadget id="calculator">4/2</gadget>
<output>2</output>
2   Height (H)= 2/2= 
<gadget id="calculator">2/2</gadget>
<output>1</output>
1   Total Area of Walls= 2(BH + LH) = 2*(2*1 + 8*1) = 2*(2+8)= 
<gadget id="calculator">2*(2+8)</gadget>
<output>20</output>
20   % change in Area of four walls= (Final Area-Initial Area)*100 /Initial Area   i.e. % change in (a) decrease by 37.5%rea of four walls = (20-32)*100 /32=- 37.5% (Decrease)   (a) decrease by 37.5%nswer: Option (a) decrease by 37.5%
<result>A</result>
The length, breadth and height of a room are in the ratio 4 : 4 : 2. If the breadth and height are halved while the length is doubled, then the total area of the four walls of the room will