Facing East, you go right 20 m (South), then left 20 m (East), then right 20 m (South), then right 40 m (West) and finally turn right again and go 40 m. From your original position, which direction are you now?
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ANorth
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BWest
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CSouth
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DEast
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ENone of these
Answer
Correct Answer: West
Explanation
Introduction / Context:This itinerary mixes several right/left turns. We compute the final coordinates and then determine the direction from the origin to the final point.
Given Data / Assumptions:
- Start facing East.
- Right 20 → South 20.
- Left 20 → East 20.
- Right 20 → South 20.
- Right 40 → West 40.
- Right 40 (turn then go) → from West, right to North → North 40.
Concept / Approach:Use coordinates with origin at the start. Sum each axis displacement and interpret the final vector.
Step-by-Step Solution:After first three legs: (20, −40).After West 40: (−20, −40).After North 40: (−20, 0).Relative to the origin, the point is 20 m West.
Verification / Alternative check:Vertical displacement cancels to zero; only a 20 m West offset remains.
Why Other Options Are Wrong:North/South/East do not match the computed negative x (West) position.
Common Pitfalls:Misapplying the last “right,” which is from West to North before moving 40 m.
Final Answer:West