The area of a rectangular grassland is 100 square meters. After reconstruction, the length of the grassland will increase to three times of the original. What is the area of the grassland after reconstruction

The area of a rectangular grassland is 100 square meters. After reconstruction, the length of the grassland will increase to three times of the original. What is the area of the grassland after reconstruction

3x100=300
If the length and width are a and B respectively, then AB = 100, and the reconstructed area is 3AB = 3x100 = 300

The length of rectangular lawn is 88 meters, the width is 1 / 4 of the length. How many square meters is the area?

Width = 88 * (1 / 4) = 22 m
Area = length * width = 88 * 22 = 1936 square meters

There is a rectangular lawn, if the length and width increase by 1 / 3, then the area increases by 6.3 square meters, find the area of the original rectangular lawn

6.3 / {(1 + 1 / 3) (1 + 1 / 3) - 1} = 8.1 square meters
A: the area of the original rectangular lawn is 8.1 square meters

A rectangular lawn has an area of 370 square meters and a width of 7 meters. After expansion, the length of the lawn will remain unchanged and the width will be increased to 28 meters. After expansion, the grassland area will be []

Length: 370 / 7M
Expanded area: (370 / 7) * 28 = 1 480 M2