Part 1:
The basics of conversions state that:
1 ml is equivalent to 1 cm³
This means that the ratio between them is 1:1
Therefore, 200 ml of water would be equivalent to 200 cm³ of water
Part 2:
Again, the basics of conversion states that:
1 ml is equivalent to 1 * 10⁻⁶ m³
We will use cross multiplication to convert 200 ml to m³ as follows:
1 ml ................> 1 * 10⁻⁶ m³
200 ml .........> ??
200 ml =
m³
Hope this helps :)