The mean distance of Mars from the sun in `1.524` times that of the Earth from the sun. Find the number of years requires for Mars make one revolution about the Sun.
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For plantes revolving around the Sun `T^(2)propr^(3)` `implies (T_(1)^(2))/(T_(2)^(2))=(r_(1)^(3))/(r_(3)^(2))=` (`T_(1)=` time period of Mars, `T_(2)=` time period of the Earth) `implies(T_(1))/(T_(2))=((r_(1))/(r_(2)))^(3//2)impliesT_(1)=T_(2)((r_(1))/(r_(2)))^(3//2)=` (1 year) `(1.524)^(3//2)` `=1.88`years
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