Answer:
72cm²
Step-by-step explanation:
perimeter= 2(l+w)
36 = 2(l+w)
36/2 = l+w
18 = l+w
since, l is twice as w
18= 2w + w
18 = 3w (we can add since all the variables, and exponents are same)
18/3 = w
6= w
NOW,
w=6 and l is equal to twice as 6
so l=12
area= l×b
= 12×6 = 72cm²
hope this helps. It was toooo long
