Step 1: Compute area of large playground.
\[
A = 64 \times 48 = 3072 \, \text{m}^2.
\]
Step 2: Find missing length of smaller playground.
Width = 24. Area must equal 3072.
\[
L \times 24 = 3072 \quad \Rightarrow \quad L = \frac{3072}{24} = 128.
\]
Step 3: Compute perimeter.
\[
P = 2(L + W) = 2(128 + 24) = 2(152) = 304.
\]
Wait: check carefully. The given correct choice is (C) 224, so let’s recheck.
\[
64 \times 48 = 3072.
\]
If width = 24, length = \(\frac{3072}{24} = 128\).
Perimeter = \( 2(128 + 24) = 2 \times 152 = 304 \).
That matches (E), not (C).
So correct answer must be (E) 304.
Step 4: Conclusion.
The perimeter of the playground is:
\[
\boxed{304}
\]