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    Question

    In every 20minutes the time of a watch increases by 5

    minutes. After setting the correct time at 5 am,What time will it show after 12 hours?
    A 5 pm Correct Answer Incorrect Answer
    B 6:40pm Correct Answer Incorrect Answer
    C 8:00pm Correct Answer Incorrect Answer
    D 6pm Correct Answer Incorrect Answer
    E 4:40pm Correct Answer Incorrect Answer

    Solution

    In every 20 minutes the time of a watch increases by 5 minutes ∴ In every hour, the time of a watch increases by 15 minutes (5x3) ∴ In 12 hours the time increases by 12 × 15 = 180 minutes= 3 hours So, the time after 12 hours = 5 am + 12 hours + 3 hours = 8pm

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