1. The length and breadth of a square are increased by 40$ and 30% respectively. The area of the resulting rectangle exceeds the area of the square by:

2. The length of a rectangular plot is twice its width. If the length of a diagonal is 9 metres, the perimeter of the rectangle is:

3. The length of a rectangle is increased by 60%. By what per cent would the width have to be decreased to maintain the same area?