More About Length:
It is the greater measurement for all two dimensional figures (figures for which only length and breadth are given).
Example: For every rectangle length is larger than the breadth.
Length is the highest measurement for all three dimensional figures (Figures for which Length, Breadth, and Height are given).
Example: For a cuboids� the length is the highest measurement.
Generally length is measured in two types of different units.
1. Customary system 2. Metric system
In metric system units for length are millimeters, centimeters, meters, Kilometers.
1 Kilometer = 1000 meters
1 Meter = 100 centimeters
1 centimeter = 10 millimeters.
In customary system (Specially followed in America) units for length are Inch, foot, yard, and mile.
1 Yard = 3 feet
1 Foot = 12 inches
Worked Example
How many centimeters are equal to 2 Km?
A. 200
B. 2000
C. 20 000
D. 20 0000
Correct answer is D
Solution
Step 1: 1Km = 1000 meters.
2 Km = 1 x 1000 = 2000 meters
Step 2: 1 meter = 100 centimeters
2000 meters = 2000 x 100 = 200 000 centimeters