Answers

2014-11-10T19:16:14+05:30
The earth is spherical because of the centrifugal force from it's rotation
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2014-11-10T19:28:29+05:30
Earth is not exactly spherical. It is bulging at the equator. Its spherical shape is due to its own gravitational pull from all directions.
The bulge at the equator is due to its spin around its own axis.
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