Question

Train a crosses a 320m pong platform in 42 sec train b which is 160 m long and running at 96 km/hr crosses train a 78/11 sec while running in opposite direction then find in how much time will train a cross a pole

Answer 1

Answer:

Step-by-step explanation:

relative distance covered : 760 + 440 = 1200m

relative/total time taken : 40 sec  

so relative speed of train : 1200÷40 = 30m/s

now in kmph : 30×( 18/5) = 108 kmph