Originally Posted by

**Soroban** Hello, Stuck686!

Sounds like you need lessons on converting units . . .

The circumference of a circle is: .C .= .2πR . (R = radius)

The radius of Earth's circular orbit is: .R = 93,000,000 miles.

The length of Earth's orbit is: .C .= .2π(93,000,000) .≈ .584,336,234 miles

Hence, the Earth travels 584,336,234 miles in one year.

584,336,234 miles . . . .1 year . . . . .1 day

---------------------- .x .----------- .x .----------- . ≈ . 66,705 miles/hour

. . . . 1 year . . . . . . . 365 days . . .24 hours