Question

A train travels 40 km at a uniform speed of 30 km per hour in average speed after travelling 40 km is 45 km per hour for the whole Journey what will be the speed in the second half of the journey

Answer 1

u = 30 km/hr
distance= 40 km
v= 45 km/ hr
speed = distance
time
45-30= 40 km
t
5 × 5= 40km
18 t
25 × 40000= t
18
25×2,222.222= t
t = 55555 sec