Two spaceships travelling in opposite directions along parallel lines measure their own and the other spaceship's length while passing one another. The crew on spaceship A says that their ship is 1000-m long and that ship B is 800-m long. The crew on ship B says that their ship is 1000-m long and that ship A is 800-m long. At what speed does each crew say that the other ship is travelling relative to their own ship?
A)0.36 c
B)0.60 c
C)0.64 c
D)0.80 c
E)1.25 c

Question

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The Answer of Two spaceships travelling in opposite directions along parallel lines measure their own and the other spaceship's length while passing one another. The crew on spaceship A says that their ship is 1000-m long and that ship B is 800-m long. The crew on ship B says that their ship is 1000-m long and that ship A is 800-m long. At what speed does each crew say that the other ship is travelling relative to their own ship?
A)0.36 c
B)0.60 c
C)0.64 c
D)0.80 c
E)1.25 c

Two Spaceships Travelling in Opposite Directions Along Parallel Lines Measure