two railway station are at distance of 96 km from each other. One train covers this distance in 40 minutes less than the other . The speed of the first is 12km/h faster than that of second. Determine the speed of both trains.

I've made the data as follows

Distance = S= 96km
Speed of train A = V= x km/h
Speed of train B = V'= x+12 km/h
Time taken by train A= t = y h
Time taken by train A= t' =y - 2/3 h

Formula applied

V=S/t
V'=S/t'

Answer I got

Speed of train A 48 km/h
Speed of train B 60 km/h

Required answer


Speed of train A 36 km/h
Speed of train B 48km/h

can someone help me to get correct answer...

speed of train A is 12 km/hr faster than train B... which means

V = x
V' = x - 12

t = y
t' = y + 2/3