Kilometer

Definition of Kilometer

• Kilometer is the unit of length in the metric system.

                            

More about Kilometer

• 1 kilometer = 1,000 meters
• 1 kilometer = about 0.62 miles

 

Examples of Kilometer

• Sandra drove for an hour and covered 33 kilometers.
• The circumference of the Earth is about kilometers.

 

Solved Example on Kilometer

A supersonic jet plane travels at a rate of 4,000 kilometers per hour for 30 minutes. Find the distance traveled.

Choices:

A. 2,500 kilometers

B. 4,030 kilometers

C. 1,500 kilometers

D. 2,000 kilometers

Correct Answer: D

Solution:

Step 1:  Distance traveled d = rt . [Distance = rate × time.]

Step 2:  r = 4000 kilometers per hour.

Step 3:  t = 30 minutes = hours = 0.5 hours. [60 minutes make one hour]

Step 4:  Distance traveled, d = 4,000 × 0.5 = 2000 kilometers.

Step 5:  So, the jet plane traveled 2,000 kilometers distance in 30 minutes.

                    

Related Terms for Kilometer

• Metric Unit

 

Real-world Connections for Kilometer

• Kilometer is the standard unit of measurement of distance and speed in many countries.
• The kilometer is a standard unit of measurement commonly used in fiber optics.

 

Additional Links for Kilometer

• Click here for samples
• Back to Mathematics Dictionary