Please help me with this question and show working (explaining every step, cause I’m having trouble with this). Thank you.

Answer:
2240km
Step-by-step explanation:
28km =45m
xkm=2h
2h=60×60
2h=3600m
28km=45m
xkm=3600m
cross multiple
45x=28×3600
45x=100800
dividing both side by 45
x=100800÷45
x=2240km