Which is revolving around sun with more speed, Mars or Earth...
Hint: Mars is forth planet from sun and Earth is Third.
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The farther a planet is from the sun, the slower is its orbit. Earth's orbital speed is about 29.8 km/s, and the orbital speed of Mars is about 24 km/s. A year on Mars is about 687 earth days. So Earth orbits the sun faster than Mars does.