For this case, what we must do is to rewrite these measurements in the same unit in order to compare them.
By writing the measurements in meters we have:
[tex] 30 mm = (30) * (\frac{1}{1000}) = 0.030 m
[/tex]
[tex] 30 cm = (30) * (\frac{1}{100}) = 0.30 m
[/tex]
[tex] 30 dm = (30) * (\frac{1}{10}) = 3 m
30 Hm = (30) * (100) = 3000 m
[/tex]
Therefore, physically the correct measure is:
[tex] 0.30 m = 30 cm
[/tex]
Answer:
the length of a student's textbook most likely is:
30 centimeters
