Best Answer

7 days = 1 week

⇒ 687 days = 687 ÷ 7 weeks

= 981/7 weeks

≈ 98.14 weeks

Q: How many weeks is 687 days?

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687 days

The martian year is 687 earth days, or nearly 2 earth years. Since the martian day is a little longer than an earth day, the martian year is only about 669 martian days in length.

687 Earth days = 1.88 Earth years. 365 days in a year so, 687 days -365 days= 322 days: so 687 days=1 year and 322 days 20 years is 7300 days

About 687 Earth days.

THE ANSWER IS 687 EARTH DAYS

Mars has a year of about 687 Earth days.

A year on Mars is 687 Earth days long.

687 days.

687 days

mercury is the planet which revollve around sun in 687 days it means there is a yeqr is equal to 687 days

Mars takes 686.971 (or 687 days) Earth days to orbit the Sun.

About 687 to 686