The thickness of a dozen coins on a metre scale was found to be 18cm. What is the thickness of one coin?

$15 c m$ .

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$1.2 c m$ .

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$1.8 m m$ .

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$15 m m$ .

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Solution

The correct option is D
$15 m m$ .

The thickness of a dozen coins (12) = 18 cm.
The thickness of one coin
= $\frac{18}{12}$ = $1.5 c m$
1.5 cm = 1.5 x 10 = 15 mm.

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