A spherical mass of 20 kg lying on the s...

A spherical mass of `20 kg` lying on the surface of the Earth is attracted by another spherical mass of `150 kg` with a force equal to `0.23 mg f`. The centres o fthe two masses are `30 cm` apart. Calculate the mass of the Earth. Radius of the Earth is `6 xx 10^(6)m`.

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