10 kilometers, because it takes 10,000 decimeters to equal 1 kilometer
Chat with our AI personalities
10 km is bigger than 100 cm
1 km = 10 dm
515 km = 515 x 10 dm = 5,150 dm
By unit of length and distance and conversion ,we can say that 1 km=10000 dm
10 dm = 1 m so 200 dm = 20m. 20 km is 1000 times as long. This is assuming "dm" = decimetres. If it = dekametres then 200 would be 2 km.