DAY 456

From Reader's Digest

If it cost one cent to ride 1,000 miles, how much would a trip around the world cost? How much to go to the moon? The sun? And how much would it cost to go to Alpha Centauri, our nearest star other than the sun. Use the following distances to help solve:


Circumference of the Earth: 25,000 miles
Distance to the moon: 240,000 miles
Distance to the sun: 93,000,000 miles
Distance to Alpha Centauri: 26,000,000,000,000 miles
                                             (26 trillion - 4.2 light years)

Answers:

25 cents to go around the Earth
$2.40 to go to the moon
$930 to go to the sun
$260,000,000 to go to Alpha Centauri

Explanation of the math:

Think of the distances as multiplied by 1,000 - to give the number of cents. Then translate the number of cents into dollars by dividing by 100 (if necessary).

Earth - circumference of 25,000 miles - 25 thousands = 25 cents

Moon - 240,000 miles from Earth - 240 thousands = 240 cents = $2.40

Sun - 93,000,000 miles from Earth - 93,000 thousands = 93,000 cents = $930

Alpha Centauri - 26,000,000,000,000 miles from Earth
                              26,000,000,000 thousands
                              26,000,000,000 cents = $260,000,000 

Note from JA: Alpha Centauri's distance at 26 trillion miles can also be expressed as 4.2 light years.