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[" Q.5At what distance from the centre o...

[" Q.5At what distance from the centre of the moon is the point at which the strength of the resultant field of "],[" earth's and moon's gravitational field is equal to zero.The earth's mass is "81" times that of moon and the "],[" distance between centres of these planets is 60R where "R" is the nulius of the earth "],[[" (A) "6R," (B) "4R," (C) "3R," (D) "5R]]

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