1. Aunt Sun has a rectangular vegetable plot with a width of 46 meters. Due to the need of building houses, the width of this vegetable field has been shortened by 16 meters, so the vegetable field area has been reduced by 800 square meters. What is the area of this vegetable field now?

There is a rectangular lawn in the citizen square. If the length of this lawn is increased by 10 meter, or the width is increased by 8 meters, the area will increase by 400 square meters. How many square meters is this lawn?

There is a square garden in the park. Now, a set of opposite sides of this square garden will be increased by 3 meters, so that the garden will become a rectangle with an area of 24 square meters more than the original one. How many square meters was the original garden?

The school has a rectangular flag-raising square 60 meters long and 50 meters wide. Build a cement road with a width of 3 meters around the square and find the area of this cement road.

5. A square garden with a side length of 18m. A path with a width of 2m is built around the garden, and a red maple is planted every two meters outside the path. * * * How many red maple will be planted?