Which is the longest distance?

• A. 2.50 m
• B. 25.0 cm
• C. 250 dm
• D. 0.00250 km
• E. All are the same distance.

Answer: (C)

Verified step by step guidance

1. Convert each distance to the same unit for comparison. Let's use meters (m) as the common unit.
2. Convert 25.0 cm to meters: \( 25.0 \text{ cm} = 0.25 \text{ m} \) because 1 cm = 0.01 m.
3. Convert 250 dm to meters: \( 250 \text{ dm} = 25.0 \text{ m} \) because 1 dm = 0.1 m.
4. Convert 0.00250 km to meters: \( 0.00250 \text{ km} = 2.50 \text{ m} \) because 1 km = 1000 m.
5. Compare all the converted distances in meters: 2.50 m, 0.25 m, 25.0 m, and 2.50 m. Identify the longest distance.