Question

solve it I will mark first answer as branliest​

Answer 1

Answer:

i don't know sorry.,,

Answer 2

Answer:

let speed of passenger train be x km/h

speed of express train = x+14 km/h

distance travelled= 168kms

d=s.t

time = d/s

given difference is 1 hour

168/x+14-168/x=1

168(1/x+14-1/x)=1

x+14-x/x(x+14)=1/168

14/x^+14x=1/168

x^ +14x= 14× 168

x^+14x-2352=0

split it

after splitting we will get two values one positive and we will get one negative.... positive one is x value

hope it is useful