From point $$\(A\)$$, Stanley walks $$\(200 \mathrm{~m}\)$$ due east to point $$\(B\)$$. From $$\(B\)$$, he then walks $$\(160 \mathrm{~m}\)$$ due south to point $$\(C\)$$. Work out the length of $$\(A C\)$$. Give your answer correct to 3 significant figures. metres

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