Description
The mean radius of a planet is 6.91 × 106 m, and that of its moon is1.42×108 cm.
From this data calculate the ratio of the planet’s surface area to that of its moon.
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Explanation & Answer
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Surface area of a sphere like the planet and the moon is given by 4πr2.
So here the ratio will be 4π(6. 91× 106) × (6.91×106)m2 : 4π(0.0142× 1.08) × (0.0142× 1.08)m2
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