Find the diameter of the images of the moon formed

Question:

Find the diameter of the images of the moon formed by a spherical concave mirror of focal length $7.6 \mathrm{~m}$. The diameter of the moon is $3450 \mathrm{~km}$ and the distance between the earth and the moon is $3.8 \times 10^{5} \mathrm{~km}$.

Solution:

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