Basically to do without measurement.

Question

If the Earth is 150,000,000km from the sun, and it takes 365.25 days to circle around the sun, show that the speed of the Earth’s orbit around the sun is 107515km/h. Give your answer to the nearest whole number.

Answer 1

The distance the earth travels in a year is the circumference of

a circle with radius 150,000,000 km

 

2πr = 2π(150,000,000) = 300,000,000π = 942,477,796.077 km

 

(942,477,796.077 km)/(365.25 days)/(24 hour/day) = 107,515 km/hr