Answer and Explanation:
1) To find : Which of the following is not the same as 1.69 meters?
Solution :
To know we have to convert unit in given options unit.
Meter into kilometer,



1 option is not same.
Meter into dekameter,



2 option is same.
Meter into centimeter,



3 option is same.
Meter into millimeter,



4 option is same.
Therefore, Only option 1 is not same.
2) Given : A cube 20 cm on one side.
To find : A cube contain how many milliliters of fluid ?How many liters of fluid is this?
Solution :
First we find the volume of the cube,
Side of cube is 20 cm.
Volume of cube is



Converting centimeter cube into milliliter,


Converting centimeter cube into liter,


