They are the same. However, "4000" is more precise than "4K", because "4K" might well refer to an approximation.
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4 km = 4000 metres. You decide which is greater.
No because 4000 m equals 4 km which is less than 40 km
Convert to the same units, then the comparison can be made: The centi- prefix means one hundredth (1/100) → 400 cm = 400 × 1/100 m = 4 m 4 < 4000 → 4 m < 4000 m → 400 cm < 4000 m So 400 cm is less than 4000 m.
less than
4000kg is greater