Answer to Question #67703 in Mechanics | Relativity for Biswajit Dolai

Question

the speed of a spacecraft moving between Earth and Mars at an instant when earth and mars are 2.4into10^11 m apart is v=0.8c. the distance between them measured from the frame where they are at rest.what is the distance between E and M in the spacecraft frame.and what time elapses betewen crossing E and reaching M.