question_answer

Two trains, each 50 m long are travelling in opposite direction with velocity 10 m/s and 15 m/s. The time of crossing is                                                                                                              [CPMT 1999; JIPMER 2000; RPET 2001]

A)          \[2s\]                             

B)          \[4\,s\]

C)          \[2\sqrt{3}s\]                 

D)          \[t=\frac{{{\nu }_{1}}-{{\nu }_{2}}}{a}\]