Answer:
Because carpentry requires Lots of measurements even on small details like edges of a cabinet, and one simple mistake will lead to the carpentry look poorly made because of that (look at the sample pictures). So a carpenter must always pay attention to the carpentry And he/she must know the calculations and the conversion of measurements.
What are the calculations and the conversion of measurements?
To convert 10 feet to inches, multiply 10 times 12 (the conversion factor) = 120 inches
To convert 10 feet to yards, multiply 10 x 1/3 = 3.3333 yards (or 3 1/3 yards)
To convert 10 feet to meters, multiply 10 x .3048 = 3.048 meters
To convert 10 feet to centimeters, multiply 10 x 30.48 = 304.8 centimeters
Hope it helps!