A (bus) drive is used for 3/5 and B (truck) drive is used for 4/5. The movement time t is the same, so the speed V (A) /V (B) =3/4?

The total distance s is solved as shown in figure s (total) = 490 m.

S (bus) =V A *5=3/4? *V B *5S (truck) =V B *5

S (total) =S (bus) +S (truck)? Can find v b

T (truck) =S divided by v (b)