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A child starts at one corner of a cubical jungle gym in a playground and climbs up to the diagonally opposite corner. The original corner is the coordinate origin, and the x, y and z axes are oriented along the
jungle gym edges. The length of each side is 2 m. The child's displacement is:
2î + 2j + 3.5k
2î+ 2f + 2.8k
O 2î + 2j + 2k
O 3.5i+ 3.5j+ 3.5k
2.81 + 2.8j + 2k

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