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At a certain depth " d " below surface of earth, value of acceleration due to gravity becomes four times that of its val…

Q1

At a certain depth "d" below surface of earth, value of acceleration due to gravity becomes four times that of its value at a height 3R above earth surface. Where R is Radius of earth (Take R = 6400km). The depth d is equal to

a

5260 km

b

640 km

c

2560 km

d

4800 km

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