Question

a 450 meter long train crossed a pole in 18 second at one station some of the carrige are remove near the next station it crossed the 15 second what is the length of the now​

Answer 1

total time = 18s

total distance=2×length of train

2×450=900

1second distance=900÷18=50

in 12s= 50×12=600

length of train now= 600÷2=300m