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If the earth considered as a solid spher...

If the earth considered as a solid sphere of iron of radius `6.37xx10^6` m and of density `7.86 g*cm^(-3)`, what will be the magnitude of the acceleration due to gravity on the earth's surface ? Gravitational constant `=6.58xx10^(-8)` CGS unit.

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It is known `rho= (3g)/(4piRG)`
`therefore g=(4pirhoRG)/3=(4xx22xx7.86xx6.37xx10^8xx6.58xx10^(-8))/(7xx3)`
`=1380.55 cm*s^(-2)`.
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