Kilometer is the unit of length in the metric system.

More About Kilometer

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

Video Examples: 3 ways to pronounce Kilometre (kilometer)

Example of Kilometer

Sandra drove for an hour and covered 33 kilometers
The circumference of the Earth is about 4 × 10^{4} kilometers

Solved Example on Kilometer

Ques: 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 =1/2 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.

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.