It would be roughly 345 Earth hours.
14 martian days x 24.623 earth hours in a martian day = 344.72 earth hours
The answer is 22 and a half in a martian year. A martian year lasts for 687 Earth days, or 669 martian days.
Mars's day-length is close to that of Earth: 24.7 hours. As such, there are 1.03 Martian days per every one Earth day; or, alternatively, 0.97 Earth days per every one Martian day.
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.
A Martian day is 24 hours 37 Earth minutes; a year on Mars takes 687 of our days.
A Martian year is equal to 1.8809 Earth years (686.971 days), or 1 year, 320 days, and 18.2 hours 12 seconds If you use the Martian day (about 2.7% longer than an Earth day) for your calculation, a Martian year is equal to 668.5991 sols. That means that Mars rotates a little more than 668 times for every revolution around the Sun.
Here is how to find the answer in mathematical steps: We first have to find out how many earth hours 355 Martian days is. Since a Martian day (called a sol) is 24.6 hrs long, we have to multiply 355 sols by 24.6 hrs to get the result of the number of earth hrs in 355 sols. 355 X 24.6 = 8,733.0 earth hours in a sol Next, we have to divide 8,733 hrs by 24 hrs to get the result of how many earth days 8,733 hrs is equivalent to. 8,733 / 24 = 363.875 earth days Finally, we should convert the .875 of 365.875 earth days to hrs. To do this, we have to multiply 24 by .875 24 X .875 = 21 hrs So in conclusion, we find that 355 sols is equivalent to 363 earth days and 21 hrs.
A year on Mars is almost twice as long as a year on Earth, being 686.9726 Earth days long. However, this would be in 24 hour "Earth days", which are about forty minutes shorter than the Martian solar day. A Martian year is about 668.6 Martian solar days. (That is about 1.88 Earth years.) A solar day, or 'sol', is how long it takes the Sun to return to the meridian, and it varies slightly each day: the average length is 24 hours 39 minutes and 35 seconds.
A Martian year is about 687 Earth days long or 668.6 Mars days long.
356. There are about 0.975 Martian days in one Earth day, and 365.25 Earth days in one Earth year, and 0.975 * 365.25 ≈ 356.009.
4 earth days is equal to 96 hrs. Since a Martian day (called a sol) is 24.6 hrs, then 4 earth days would be equal to 3.9 sols. Comment: This isn't answering the question, but the question doesn't make much sense.
90 hours would be 3.75 earth days.