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प्रश्न
Using the simplified formula, at what height does gravity decrease by 10% if Earth's radius is 6400 km?
विकल्प
100 km
200 km
320 km
640 km
MCQ
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उत्तर
320 km
Explanation:
From the example in the source: h = R/20 = 6400/20 = 320 km. This is calculated using 0.9 = 1 - 2h/R.
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