Answer:
speed of A = 200km/h
speed of B = 250km/h
Explanation:
speed of A be x
we know that [tex]time = \frac{distance}{speed}[/tex]
[tex]\frac{1400}{x} =\frac{1000}{(x + 50)} + 3[/tex]
[tex]1400(x + 50) = 1000x + 3(x^2 + 50x)[/tex]
[tex]3x^2 - 250x - 70000 = 0[/tex]
x = 200 km/h
speed of A = 200km/h
hence
speed of B = 250km/h
