A train crosses a platform of 250 m in 20 sec, same train crosses another platform of length 640m in 40 sec. then find the length of the train? Choose the correct choice
A) 150m B) 180m C) 152m D) 140m E) 160m
Length of the train be ‘X’   X + 250/20= X + 640/40   2X + 500 = X + 640   X = 140m   Answer:140m
<result>D</result>
A train crosses a platform of 250 m in 20 sec, same train crosses another platform of length 640m in 40 sec. then find the length of the train?