Perimeter is just twice the sum of length and width, in this case 2 x 11 m ie 22 m.
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what is the perimeter of a rectangle 8mm by 3m
Hi
(L + W) x 2 (8 + 3) x 2 = 11 x 2 = 22m
A rectangular prism with a length of 11m, width of 8m and height of 3m has a volume of 264m3
Use Pythagoras' theorem:- 82+32 = 73 and the square root of this is length of the diagonal which is about 8.544m to 3 decimal places