Question

13)The mean radius of the earth's orbit round the sun is 1.5 X 1011. The
mean radius of the orbit of mercury round the sun is 6 X 1010 m. The
mercury will rotate around the sun in
(a) a year (b) nearly 4 year
(c) nearly 1/4 year (d) 2.5 years
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Answer 1

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