Question

Saturn's rings extend to about 120,000 kilometers above Saturn's equator. Saturn's diameter at its equator is also about 120,000 kilometers. About what is the circumference of Saturn's rings? Use 3.14 for π

π
. Round to the nearest thousand kilometers.


1,130,000 km
360,000 km
377,000 km
754,000 km

Answer 1

1130400 km

Explanation:

We know the formula for circumference of a circle:

Circumference =
`2\pi r`

So we need the radius of Saturn ring to calculate its circumference.

We are given Saturn's diamter which is 120,000km; and know that Saturn's ring extends for about 120,000 km from the circumference of the Saturn.

Therefore, the radius of Saturn's ring will be 120000 km plus half of the diameter of Saturn:

Radius of Saturn's ring = 120000 + (120000/2) = 180000 km

Circumference of Saturn's rings = 2 x 3.14 x 180000 = 1130400 km