एक व्यक्ति अपने घर से सीधा 100 m चलता है, बाएँ मुड़ता है और 100 m चलता है, पुनः बाएँ मुड़ता है और 300 m चलता है, फिर दाएँ मुड़ता है और अपने कार्यालय पहुँचने के लिए 100 m चलता है। यदि उसका कार्यालय सटीक उत्तर-पूर्व दिशा में है, तो वह प्रारंभ में अपने घर से किस दिशा में चलता है?
Read this question in English
A person walks 100 m straight from his house, turns left and walks 100 m, again turns left and walks 300 m, then turns right and walks 100 m to reach his office. In which direction does he walk initially from his house if his office is exactly in the North-East direction?
(a) North-West · (b) West · (c) South · (d) South-West
उत्तर और व्याख्या · explanation in English
Answer: (c) दक्षिण
Assume he starts facing North and trace the walk: the office ends up 200 m West and 200 m South, i.e. South-West. For it to be North-East the whole path must be turned through 180°, so he actually started walking South.
- Try starting North: 100 m North; left, so 100 m West; left again, so 300 m South; right, so 100 m West.
- Net: 300 − 100 = 200 m South and 100 + 100 = 200 m West, so the office would be South-West.
- The office is actually North-East, exactly opposite, so rotate everything by 180°: the first walk was South.
- Check: 100 m South; left, 100 m East; left, 300 m North; right, 100 m East. Net 200 m North and 200 m East, i.e. North-East.
Remember · Assume North, solve, then rotate the whole figure to match the given final direction.
Question and answer: UPSC's official GS Paper II (2024, Series A) — paper ↗ · answer key ↗. Explanation: Minimalist IAS, checked 30 Sept 2026 (how we verify). ·