You cannot directly convert these. You need to know the shape and the other dimensions to first calculate the volume. Then use the density of material to convert to weight.
Millimetres and millimetres are the same measurement. Therefore, 160 millimetres is equal to 160 millimetres.
40 millimetres
Millimetres and millimetres are the same measurement. Therefore, 20 millimetres is equal to 20 millimetres.
245 millimetres.
23.6 millimetres
There are 914.4 millimetres in a yard.
38 millimetres
Millimetres and millimetres are the same measurement, therefore 5.9 millimetres is equal to 5.9 millimetres.
There are 10 millimetres in a centimetre, Multiplying by 10 gives us the answer in millimetres. 13x10 is 130 millimetres,
Millimetres and millimetres are the same measurement. Therefore, 547 millimetres is equal to 547 millimetres.
2. That's kind of obvious from the name - 2 millimetres
There are 30 millimetres in 3cm