The perimeter is given by the following formula:
P = 2w + 2l
Where:
w = width = 13.8
l = length = 18
So:
P = 2*18 + 2*13.8 = 63.6
The area is:
A = w*l
A = 13.8*18 =248.4
1.6m questions
2.0m answers