Two spaceships,each 100 m long in its own rest frame,approach Earth from opposite directions,with equal speeds relative to Earth.As measured by a passenger in one of the spaceships,the other spaceship is 96 m long.What is the speed of the spaceships relative to Earth?
A)c/7
B)c/6
C)c/5
D)c/4
E)c/3

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The Answer of Two spaceships,each 100 m long in its own rest frame,approach Earth from opposite directions,with equal speeds relative to Earth.As measured by a passenger in one of the spaceships,the other spaceship is 96 m long.What is the speed of the spaceships relative to Earth?
A)c/7
B)c/6
C)c/5
D)c/4
E)c/3

Two Spaceships,each 100 M Long in Its Own Rest Frame,approach