To compare and place them in ascending order, All these three values should be in same unit . Here two of them are in km/s while third one is km/mt
Lets convert that to km/s
We know 1min(mt) = 60s
So 180km/mt = 180km/(60s) = 3km/s
So First one 18km/s
Second one 4000km/s
And third one 3km/s
And we can write the increasing order/ascending order as
3km/s < 18km/s < 4000km/s (Answer)
Or we can write
180km/mt < 18km/s < 4000km/s (Answer)