NONE. -meter is length.
1 m=100 cm therefore 3*100=300 cm
300, because I meter is = 100 centimeter so 100 multiply but 3 = 300
2 meter (pretty tall)
1900 ml
That is 3.75 ml.
Although "diameter" usually refers to circular objects, if we define it as "a straight line passing from side to side through the center of a figure," then the distance in this case would be 3 meters. It's more likely that you meant to ask about the perimeter, which is the distance around, which is 12 meters.
5
10
29.57 ml
That is 839,000 ml.
That is 3,070 ml
That is 1,500 ml.