Xiao Ming drew a plan of an experimental field with a scale of 1:100. It is 5cm long and 1cm wide. How much is the actual area

Xiao Ming drew a plan of an experimental field with a scale of 1:100. It is 5cm long and 1cm wide. How much is the actual area

The formula: 1x500 / 100 = 5m, 1x100 / 100 = 1m, 5x1 = 5m2

Draw a rectangular piece of land on the plan with a scale of 1:200. The perimeter of the rectangle on the plan is 54 cm, and the ratio of length to width is 5:4. It is necessary to analyze the actual area of the rectangular land

Sum of length and width: 54 / 2 = 27cm
Length: 27 / (5 + 4) * 5 = 15 cm
Width: 27-15 = 12cm
Actual length: 15 * 200 = 3000cm = 30m
Actual width: 12 * 200 = 2400cm = 24m
Actual area: 30 * 24 = 720 square meters

Draw a rectangular piece of land with an area of 12000 square meters on a plan with a scale of 1:2000. On the plan, the area of the land is () square percent

Draw a rectangular piece of land with an area of 12000 square meters on a plan with a scale of 1:2000. On the plan, the area of the land is (30) square centimeters