Diagram NOT accurately drawn $$\(M, N\)$$ and $$\(P\)$$ are points on a circle, centre $$\(O\)$$. $$\(M O N\)$$ is a diameter of the circle. $$\(M P=3.5 \mathrm{~cm}\)$$ $$\(P N=9.7 \mathrm{~cm}\)$$ Angle $$\(M P N=90^{\circ}\)$$ Work out the circumference of the circle. Give your answer correct to 3 significant figures. $$\(\mathrm{cm}\)$$

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