Question

area of a rectangle is how many with side 1 m and 80 cm

Answer 1

Length of rectangle = 1 m = 100 cm
Width of rectangle = 80 cm

Area = 100 * 80
= 8000 cm^2

Answer 2

Area of rectangle = l * b

Length = 1m = 100 cm.
Breadth = 80cm

Now, area = 100 * 80 = 8000 cm²

Hope it will help you !!!