The height at which the value of acceleration due to gravity becomes 50% of that at the surface of the earth (Radius of the earth =6400 km) is nearly
2650 km
2430 km
2250 km
2350 km
A
2430 km
B
2650 km
C
2350 km
D
2250 km
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Solution
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Acceleration due to gravity a height h from earth's surface is given by: gh=g(RR+h)2
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