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30 mm = 0.098425 '
As 25.4 mm equal 1 in exactly, divide 30 mm by 25.4 mm/in to convert it to inches. → 30 mm = 30 ÷ 25.4 in ≈ 1.18 in
3 mm x 30 mm = 90 mm2 = .9 cm2
30 mm Is The Largest
1 cm = 10 mm ⇒ 3 cm = 3 x 10 mm = 30 mm