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A complete cycle of a traffic light takes 60 seconds. During each cycle the light is green for 25 seconds, yellow for 5 seconds and red for 30 seconds
A trader fixed the price of an article in such a way that by giving a rebate of 10 % on the price fixed he made a profit of 15 %. If the cost of the a
The correct answer is option (b): India. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
This question was asked in UPSC CSE Prelims 2002, GS Paper 1, as Question 90. It falls under Science & Technology > Space Technology & Astronomy.
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
UPSC has asked 69 questions from Space Technology & Astronomy (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.