Question: If the length of a rectangle is increased by 14.28 percent, then by how much percentage its breadth should be reduced to keep the area same?
- 14.28 percent
- 12.5 percent
- 14 percent
- 16.66 percent
Answer: 2. 12.5 percent
Solutions:
Area of rectangle be x. length be y. breadth be z. new breadth be z1.
then x=yz
x=(1.1428y)(z1)=yz
z1=1/1.1428=0.875
z1-1=0.125
percentage= 12.5