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,
\(1 \text{ meter} = \frac{1}{1000} \text{ kilometer}\)
\(1.69 \text{ meter} = \frac{1.69}{1000} \text{ kilometer}\)
\(1.69 \text{ m} =0.00169\text{ km}\)
1 option is not same.
Meter into dekameter,
\(1 \text{ meter} = \frac{1}{10} \text{ dekameter}\)
\(1.69 \text{ meter} = \frac{1.69}{10} \text{ dekameter}\)
\(1.69 \text{ m} =0.169\text{ dkm}\)
2 option is same.
Meter into centimeter,
\(1 \text{ meter} =100 \text{ centimeter}\)
\(1.69 \text{ meter} =1.69\times 100\text{ centimeter}\)
\(1.69 \text{ m} =169\text{ cm}\)
3 option is same.
Meter into millimeter,
\(1 \text{ meter} =1000 \text{ millimeter}\)
\(1.69 \text{ meter} =1.69\times 1000\text{ millimeter}\)
\(1.69 \text{ m} =1690\text{ mm}\)
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 \(V=s^3\)
\(V=(20)^3\)
\(V=8000cm^3\)
Converting centimeter cube into milliliter,
\(1 cm^3=1 \text{ milliliter}\)
\(8000 cm^3=8000 \text{ milliliter}\)
Converting centimeter cube into liter,
\(1 cm^3=0.001 \text{ liter}\)
\(8000 cm^3=8000\times 0.001 \text{ liter}\)
\(8000 cm^3=8 \text{ liter}\)
