Find the time between 3 and 4 clock when the angle between the hands of a watch is one third of a right angle.

Find the time between 3 and 4 clock when the angle between the hands of a watch is one third of a right angle.

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2 thoughts on “Find the time between 3 and 4 clock when the angle between the hands of a watch is one third of a right angle.”

  1. Answer:

    Step-by-step explanation:

    The time between 3 and 4 o’clock when the angle between the hands of a watch is one-third of a right angle is 3 o clock and 2.7272 minutes

    Solution:

    Speed of hour hand as it moves

    That is in 60 minutes hour hand moves

    So in 1 minute hour hand moves = degrees

    So in x minutes hour will move

    At 3 o clock, hour hand is 45 degree ahead of minute hand.

    So after 3 o clock and x minutes, position of hour hand = + 45 degree

    In 60 minutes, minute hand moves

    In 1 minutes, minute hand moves

    So in x minutes , minutes hand moves

    We want that value of x when:

    one third of right angle is

    x + 90 -12x = 60

    -11x = 60 – 90 = -30

    So at 3 o clock and 2.7272 minutes, angle between the hands of a watch is one-third of a right angle.

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