> A/C => (240-80)/(240+80) => 1/2 { spd } > 2 : 1 => 4 : 2 | Hard Question Series💪🏻

> A/C => (240-80)/(240+80) => 1/2 { spd }

> 2 : 1 => 4 : 2 { tym A : C }

> B tyn => (4+2)/2 => 3

> 4 : 3 : 2 [ tym ]
> 3k : 4k : 6k [ spd ]

> 240/3k - 240/4k = 1
> k => 20 kmph

> C-A => 3k => 60 kmph