alleryA bead is 4 cm across. Give its width in millimetres.
A400
B40
C4000
D4
Answer & Solution
Correct answer: B. 40
1. 1 cm = 10 mm.
2. 4 × 10 = 40.
3. So 4 cm = 40 mm.
_Source: Wikipedia, Millimetre (CC BY-SA 4.0, rev 1379027229), Millimetre_
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