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TS Police SI Prelims 2022 · Question 20

Question 20 of the TSLPRB SI Preliminary Written Test 2022 (7 August 2022). Try it first, then open the answer and explanation.

  1. SI Prelims 2022 · Q20 · Reasoning & Mental Ability · Calendar & Clocks

    If m and n are the number of rotations of hour-hand and minute hand of a clock respectively in 72 hours, then n - m =

    1. 66
    2. 72
    3. 24
    4. 56

    ఒక గడియారంలో 72 గంటలలో గంటల ముల్లు, నిమిషాల ముల్లులు వరుసగా m మరియు n సార్లు పూర్తి భ్రమణం చేస్తే n - m =

    1. 66
    2. 72
    3. 24
    4. 56
    Show answer

    Answer: (1) 66

    సమాధానం: (1) 66

    The hour hand makes one rotation every 12 hours, so m = 72/12 = 6; the minute hand makes one rotation every hour, so n = 72. Hence n - m = 66.

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