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A spelunker is surveying a cave. She follows a passage 180m straight west, 210 m in a direction 45o east of south, and then 280 m at 30o east of north. After a fourth unmeasured displacement, she finds herself back where she started, use a scale drawing to determine the magnitude and direction of the fourth displacement. (See also Problem 1.73 for a different approach to this problem). |
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