It doesn't need to be rounded. 2.1 km is the same as 2,100 meters. That's already
rounded to the nearest meter, the nearest 10 meters, and the nearest 100 meters.
It is 4674 km rounded
It depends on what measure it is that you are trying to round.
200 km
28 km
1 km = 1000 meters 1 meter = 0.001 km
12.0 km
3 km
12.0 KM
It is 4674 km rounded
30 km
It depends on the units for 20.72. 20.72 metres, rounded to the nearest tenth km is 0.0 km.
21 km squared
That depends on what you have 10864 of. If that's 10864 km, then it is already rounded to the nearest km. If it's 10864 something elses, you should tell us what it is.
3.1115923535
The circumference of a circle with radius of 7 km is 44.0 km (to the nearest tenth), and the area of a circle with radius of 7 km is 153.9 km (to the nearest tenth).C = 2 pi RA = pi R2
1 km = 1000 meters 1 meter = 0.001 km
1 km = 1000 meter 1 meter = 0.001 km one tenth of a meter = 0.1 meter = 0.0001 km