Two Stationary Space Stations Are Separated by a Distance of 20

Two stationary space stations are separated by a distance of 20 light-years as measured by someone on one of the space stations.A spaceship traveling at 0.90 c relative to the space stations passes by one of the space stations heading directly towards the other one.How long will it take to reach the other space station as measured by someone on the spaceship?

A) 7.0 years
B) 8.7 years
C) 9.7 years
D) 22.2 years
E) 24.7 years

Correct Answer:

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