A ball on a porch rolls 60 cm to the porch’s edge, drops 40 cm, continues rolling on the grass, and eventually stops 80 cm from the porch’s edge.

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A ball on a porch rolls 60 cm to the porch’s edge, drops 40 cm, continues rolling on the grass, and eventually stops 80 cm from the porch’s edge. What is the magnitude of the ball’s total displacement, in centimeters?

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