Question

an artificial satellite is moving in a circular orbit of radius 42250 km calculate its speed if it takes 24 hour to revolve around the earth

Answer 1

we know that

speed  = distance travelled / time taken

here,

distance travelled = perimeter of the orbit = 2πr = 2π x 42250 km

time taken = 24 hours

so,

speed of artificial satellite = 2π x 42250 / 24

thus,

speed = 11059 km/hr

Answer 2

Hey there!

Given,

Radius (r) = 42250 km

Time (t) = 24 hours

Distance will equal to perimeter of the orbit

= 2πr

= 2π * 42250

Speed of artificial satelite  

= 2π * 42250/24

= 11059 km/h

Hope It Helps You!