Answer :
Formula:-
[tex]\boxed{\sf Speed=\dfrac{Distance}{Time}}[/tex]
For 1st bus:-
- Distance=160km
- Time=4h
[tex]\\ \sf\longmapsto Speed=\dfrac{160}{4}[/tex]
[tex]\\ \sf\longmapsto Speed=40km/h[/tex]
For 2nd bus
- Distance=175km
- Time=5h
[tex]\\ \sf\longmapsto Speed=\dfrac{175}{5}[/tex]
[tex]\\ \sf\longmapsto Speed=35km/h[/tex]
Bus 1moved faster