A rectangular cupboard is of length 3 m and perimeter 30 m. Find the width of the cupboard.

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Solution

The correct option is C $12$ m
Perimeter of the rectangle = $2 \times (l + w)$
$30 = 2 \times (3 + w)$
$15 - 3 = w$
w = $12$
Therefore, width of rectangular cupboard is $12$ m.

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