Sam has nearly finished his maths homework but is struggling with the last question.
Can you help Sam answer the following question?
The distance from the Earth to the Sun is 93 million miles.
Assuming it takes 365 days for the Earth to travel once around the Sun and that the Earth travels in a circle with the Sun at the centre.
Work out the average speed of the Earth in miles per hour.
Answer:
Firstly we need to find the distance travelled by the sun.
This will be the circumference of the circle = 2 πr = 2 x π x 93,000,000 = 584,336,234 miles
1 day = 24 hours, so T = 365 x 24 = 8760 hours
S = D/T
Therefore:
S = 584,336,234/ 8760 = 66,705 mph