Planet stars approximately 14158200 miles away from our sun

Planet stars approximately 14158200 miles away from our sun. It takes 686.98 days for Mans to make one orbit. How fast (in MPH) is this planet morning around the sun?

Solution

given distace of mars from sun , r=141585200 miles

time taken for 1 orbot =686.98 days

time taken for 1 orbot =686.98*24

time taken for 1 orbot =16487.52 hours

distance covered in 0ne orbit =2 r

distance covered in 0ne orbit =2*141585200

distance covered in 0ne orbit =889606048.354 miles

speed of planet =889606048.354 /16487.52

speed of planet =53956 miles per hour

planet moving around sun at 53956 MPH