• # question_answer A train is moving with a speed of 180 $km/hr$ It's speed in m/sec is? A) 5 m/sec.           B) 30 m/sec.C) 40 m/sec.                      D) 50 m/sec.

Required speed of train $=\frac{180\times 5}{18}m/\sec$                                            $=50m/sec$