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Answer 1 · 2017-08-06T10:38:09

Around #107,543# #km#/#hour#

Earth Orbits The Sun 365 days a year.

#Speed=(Distance)/(Time)#.

#Distance=2pir#

#Time=365days*24hr=8760hrs#

#r=au=1.496*10^8km#*

Lets take #au# as #1.5*10^8km#

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Applying formula,

#Speed=(2*pi*1.5*10^8)/8760#

Lets take #pi# as #3.14#,

#Speed=(2*3.14*1.5*10^8)/8760=(942,000,000)/8760=#

#107,543(approx)# #km##/hr#.

au= Astronomical unit - is the average distance between the sun and earth.*