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Size or distance from an angle subtended (arc = radius x angle)

This type of question, asked 2 times: 2021 Paper 20, 27 Jun 2022. All 2 questions below, oldest first.

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  1. Question 1

    2021 Paper 20

    8
    A huge circular arc of length 4.4 ly subtends an angle of 4′′4'' (4 seconds of arc) at the centre of the circle. How long it would take for a body to complete 4 revolutions if its speed is 8AU8AU per second? Given: 1 ly =9.46×1015 m= 9.46 \times10^{15}\text{ }m 1AU=1.5×1011 m1AU = 1.5 \times10^{11}\text{ }m

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  2. Question 2

    27 Jun 2022

    92
    The distance of the Sun from earth is 1.5×1011 m1.5 \times10^{11}\text{ }m and its angular diameter is 2000′′2000'' (2000 seconds of arc) when observed from the earth. The diameter of the Sun will be:

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