Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Eduncle Best Answer
Length of train = 100 m
length of bridge = 200 m
width of bridge = 20 m
time = 20 sec
Total distance = 200 + 100 = 300 m
Speed = Distance / time = 300 / 200 = 15 m/sec
Speed = 15 * 18 / 5 km/hr
54 km / hr