1. The area of a square field is 18 hectares. How much distance (in m) does a man have to cover to cross it diagonally? Note that 1 hectare = 10000 m2.   Hint Hint       2. The length of a rectangular hall is 10 m more than its breadth. The area of the hall is 875 m2. Find its length (in m).   Hint       3. The perimeter of a rectangle is 96 m and its breadth is 14 m. Find its area (in m2).   Hint       4. The breadth of a lawn in the shape of a rectangle is ¼th its length. If the perimeter of the plot is 320 m, find its area (in m2).   Hint       5. The length of the diagonal of a rectangle is 61 cm and its area is 660 cm2. Find the perimeter (in cm upto two decimal places) of the rectangle.   Hint       6. The difference between the length and the breadth of a rectangle is 25 m. If its perimeter is 210 m, find its area (in m2).   Hint       7. The length of the diagonal of a square is 30√2 cm. Find its perimeter (in cm).   Hint