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UPSC 2009: A person travels 12 km due North, then 15 km due East, after that 15 km due West and then 18 km due South. How far is he from the starting point ?
(a)6 km
(b)12 km
(c)33 km
(d)60 km
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Not attemptedCorrect Answer: (a) 6 km
Net east–west displacement is zero (15 km east followed by 15 km west). Net north–south displacement = 12 km north − 18 km south = 6 km south; the person therefore ends 6 km from the start. ([doubtnut.com](https://www.doubtnut.com/pcmb-questions/29140?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2009 Science & Technology question?▼
The correct answer is option (a): 6 km. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Logical Reasoning & Puzzles question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2009, GS Paper 1, as Question 70. It falls under Science & Technology > Logical Reasoning & Puzzles.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Logical Reasoning & Puzzles?▼
UPSC has asked 71 questions from Logical Reasoning & Puzzles (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.