Question

which of the following is not equal to 120 centimeters
0.0012 km
0.012 dkm
1.2 m
1200 mm

Answer 1

Answer:

0.012 dkm

Explanation:

• Length is measured in meters as the SI units.
• However, other units can be used from the conversion of meters to various units such as kilometer, millimeters, centimeters, meters, decameters , etc. using conversion factors.
• The inter-conversions of units used to measure length;

Kilometer(km

×10

Hectometer(hm)

×10

Decameter(dkm)

×10

Meter(m)

×10

Decimeter(dm)

×10

Centimeter(cm)

×10

Millimeter(mm)

Therefore, from the above measurements we can derive the conversion factors.

For example;

m to km (1000), thus 1 kilometer = 1000 meter

cm to m (100), thus, 1 meter = 100 centimeter

cm to dkm (1000), thus, 1 Decameter = 1000 centimeter

mm to cm (10), thus, 1 centimeter = 10 millimeter

Therefore,

120 cm is equivalent to;

i) 120 cm ÷ 100,000 cm/km

= 0.0012 km

ii) 120 cm ÷ 100 cm/m

= 1.2 m

iii) 120 cm ÷1000 cm/dkm

= 0.12 dkm

iv) 120 cm × 10 mm/cm

= 1200 mm

Therefore, the measurement that is not equal to 120 cm is 0.012 dkm

Answer 2

Answer:

0.012 dkm

Explanation:

Hello,

In this case, by converting 120 cm to km, dkm, m and mm we prove each value as:

$120cm*\frac{1m}{100cm} =1.2m\\\\120cm*\frac{1m}{100cm}*\frac{1km}{1000m} =0.0012km\\\\120cm*\frac{1m}{100cm}*\frac{1000mm}{1m}=1200mm\\\\120cm*\frac{1m}{100cm}*\frac{1dkm}{10m}=0.12dkm$

Hence, 0.012 dkm is wrong, because the correct value is 0.12 dkm.

Best regards.