Question

If the length and breadth of a rectangle is increased by 30%.Then by what % area of rectangle will increase?

Answer 1

let length & breadth of rectangle be x &y and they get increased by 30% then new length would be 130/100x and 130/100y
therefore new area would be 130/100xmultiplied by 130/100y which gives newarea equals 16900/10000xy or 169/100xy which is clearly 69% more than the previous area of xy