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Mirror Formula and Magnification

Question 130 ...

Question

Question 130

The moon is about 384000 km from earth and its path around the earth is nearly circular. Find the length of the path described by moon in one complete revolution. (Take, $π = 3.14$ )

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Solution

Length of path described by moon in one complete recolution = $2 π r$

$= 2 \times 3.14 \times 384000$ [ $∵$ radius = distance of moon from the earth]

$= 2411520 k m$

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