The radius of the Earth is 6.37 x106m and its average density is 5.517 x103kgm-3. Calculate the mass of earth to correct significant figures.

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JEE Main Maths, Physics With 12 years exp.

6×10^24kg , since m=V×p =(4/3)×pi.r^3
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Answer is 5.975 ×10^24 kg . Simply use mass = density × volume. Vol= 4/3 Π r^3
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Density=Mass/volume As earth is considered sphere, So volume=(4 π r^3)/3 where r=radius of earth Now put the values
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