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masha68 [24]
2 years ago
15

A planet has a circular orbit around a star. It is a distance of 81,000,000 km from the centre of the star. It orbits at an aver

age speed of 46,000 km/h. How many Earth days does it take the planet to orbit the star? Give your answer to 2 sf.
Mathematics
1 answer:
slava [35]2 years ago
5 0

81,000,000 \text{ km} \left(\frac{1 \text{ h}}{46,000 \text{ km}} \right) =\frac{40500}{23} \text{ h} \\ \\ \frac{40500}{23} \text{ h} \left(\frac{1 \text{ days}}{24 \text{ hours}} \right) \approx \boxed{73 \text{ days}}

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