A cubical cardboard gift box has an outer edge of

MATHEMATICS · Subjective · CBSE · Mathematics · Surface Areas and Volumes · Surface Areas and Volumes

Problem

18\,\text{cm}

. It is to be completely wrapped with decorative paper. While wrapping,

10\%

extra paper must be allowed for overlaps and wastage. The paper is sold in sheets, each of area

540\,\text{cm}^2

. Calculate: (i) the total area of paper actually needed including the

10\%

extra, and (ii) the least number of whole sheets that must be purchased to wrap one box. Give all calculations clearly.