Puzzle for April 13, 2010

Saturday is the anniversary that, with the world anxiously watching, Apollo 13, a U.S. lunar spacecraft that suffered a severe malfunction on its journey to the moon, safely returned to Earth. 6 days earlier (on April 11), the third lunar landing mission was launched from Cape Canaveral, then two days later (today) an Oxygen tank blew up in a spacecraft.

When the oxygen tank exploded, the spacecraft was 200,000 miles from Earth. How fast was Apollo 13 traveling to get that for in two days?

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