Question

100 metre track a train Moves the first 50 km with a uniform speed of 50 kilometre per hour how fast must the train travel the next 50 kilometres so as to have average speed of 60 km per hour​

Answer 1

We have,

total distance = 100km

total speed required = 60km/hr

Hence, total time that will be reqd. = d/s = 5/3 hrs

Now, we have time= 2/3 hrs and distance = 50km; Hence, the speed for the last 50km = d/t

$= \frac{50}{ \frac{2}{3} } \: km \: {s}^{ - 1} \\ = 75 \: km \: {s}^{ - 1}$

HOPE THIS COULD HELP!!!