Calculate the ground distance of a journey that is 450 millimeters
There are 1000 millimeters in one meter. Therefore, 450 millimeters is equal to 0.45 meters.
To convert meters to kilometers, divide by 1000. So, 0.45 meters is equal to 0.00045 kilometers.
Therefore, the ground distance of a journey that is 450 millimeters is 0.00045 kilometers.