APPSC Group 1 Prelims 2019 Paper 2 · Question 11

Question 11 of the APPSC Group-I Prelims 2019 Paper II (26 May 2019). Try it first, then open the answer and explanation.

1. Prelims 2019 · P-II · Q11 · Mental Ability & Reasoning · Reasoning

   At what time between 5:30 and 6 will the hands of a clock be at right angles?

   5:30 మరియు 6 ల మధ్య ఏ సమయానికి గడియారపు ముళ్ళు రైట్ కోణంలో ఉంటాయి?

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   Answer: 43 7/11 min. past 5

   సమాధానం: 43 7/11 నిమి. 5 తర్వాత

   At 5:00 the hour hand is 150° ahead of the minute hand, and the minute hand gains 5.5° per minute. For the minute hand to be 90° ahead: 5.5m = 150 + 90 = 240, so m = 480/11 = 43 7/11 minutes past 5.

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