Question

12. The length of Kanpur Mail is 120 m and that of Punjab
Mail is 80 m. These two trains are running in the same
direction with speeds of 40 km/h and 50 km/h
respectivley. The time taken by them to cross each
other is
(a) 8 seconds
(b) 72 seconds
(d) 12.5 seconds
(c) 115 seconds​

Answer 1

Answer:

c is the correct answer to this question

Answer 2

Answer:

total D =200m

relative speed =50-40=10 km / hr

time = 200*3600/10*1000

= 72 sec