To find the perimeter of the rectangle, we need to know it's width, so the area of a rectangle is given by:
A=Length*Width
30=10*Width
Width=30/10=3
Now, we can calculate the perimeter of the rectangle, perimeter is given by:
P=2L+2W
P=2(10)+2(3)
P=20+6=26 m
It's perimeter is 26 m