Explain how the mass of the Earth can be estimated from the knowledge of G?

Explanation

We know that,
`g=(GM)/(R^2)rArrM=(gR^2)/(G)`
Substituting the values,
`M=(9.8xx(6400xx10^(3))^(2))/(6.67xx10^(-11))`
`M=6.01xx10^(24)kg`