The speed of an object moving in a circular orbit (or circular path) is given by the formula :
`" "v= (2pir)/(t)`
Here, `" "` Speed, `v` = ? `" "` (To be calculated)
`" ""Pi",pi=(22)/(7)" "` (It is constant)
`" "` Radius, r = 42250 km
And, `" "` Time, `t` = 24 h
Now, putting these values in the above formula, we get :
`" "` Speed, `v = (2xx22xx42250)/(7xx24)`
`" "v= 11065.4" km "h^(-1)`
We can convert this speed from kilometres per hour to kilometres per second by dividing it by the number of seconds in 1 hour (which is 60 `xx` 60 s). Thus :
`" "v= (11065.4)/(60xx60)"km "s^(-1)`
`" "v= 3.07" km"s^(-1)`
