Question

if a train crosses a point in 27/2sec, moving with a speed of 30km/h, length of the train is

Answer 1

Speed of train= 30km/h
Distance covered in 1 hour or 60 minute = 30 km or 30000mtr

Distance covered in 1 minute= 30000/60= 500 mtr
Distance covered in 1 second= 500/60 = 50/6 mtr
Distance covered in 27/2 second 50/6 × 27/2
=450/4 mtr
=112.5 mtr
So length of train = 112.5mtr