Questions: Which length is the longest? Multiple Choice 12 m 12,000 mm 12,000 μm 12,000 cm 0.0012 km

Solution Steps

To compare the lengths, we need to convert all of them to the same unit. Let's convert everything to meters (m).

1. \( 12 \, \text{m} \) is already in meters.
2. \( 12,000 \, \text{mm} \): \[ 12,000 \, \text{mm} = 12,000 \times 10^{-3} \, \text{m} = 12 \, \text{m} \]
3. \( 12,000 \, \mu\text{m} \): \[ 12,000 \, \mu\text{m} = 12,000 \times 10^{-6} \, \text{m} = 0.012 \, \text{m} \]
4. \( 12,000 \, \text{cm} \): \[ 12,000 \, \text{cm} = 12,000 \times 10^{-2} \, \text{m} = 120 \, \text{m} \]
5. \( 0.0012 \, \text{km} \): \[ 0.0012 \, \text{km} = 0.0012 \times 10^{3} \, \text{m} = 1.2 \, \text{m} \]

Now that all lengths are converted to meters, we can compare them directly:

• \( 12 \, \text{m} \)
• \( 12 \, \text{m} \)
• \( 0.012 \, \text{m} \)
• \( 120 \, \text{m} \)
• \( 1.2 \, \text{m} \)

Final Answer