Question

the dimension of an encyclopedia are 24cm*12cm*6cm.it is so to be covered with a plastic sheet.if each encyclopedia requires 170sq.cm of extra sheet for folding.how much plastic sheet is required to wrap such encyclopedias.

Answer 1

tsa=
$2(24 \times 12 + 12 \times 6 + 6 \times 24)sq.cm. = 1008 \: sq.cm.$
therefore 1008 sq cm+ 170 sq cm=1178 sq cm= reqd. answer

Answer 2

tsa=

$2(24 \times 12 + 12 \times 6 + 6 \times 24)sq.cm. = 1008 \: sq.cm.2(24×12+12×6+6×24)sq.cm.=1008sq.cm.$

therefore 1008 sq cm+ 170 sq cm=1178 sq cm= reqd. answer