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  • A book is 10 cm x 18 cm long and 2 cm thick. It has a protective paper ‘jacket’ over the entire cover and folding 5 cm under the front and back covers. How much paper is needed for the ‘jacket’?

A book is 10 cm x 18 cm long and 2 cm thick. It has a protective paper ‘jacket’ over the entire cover and folding 5 cm under the front and back covers. How much paper is needed for the ‘jacket’?

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The;required;are;will;be=area;of;side; imes 2+;inside;folds imes 2 + thickness;area\* ecause side; are;identical\* area;of;side=10 imes 18=180; cm^2\* area;of;thickness=18 imes 2=34;cm^2\* inside;area=5 imes 18=90;cm^2 \* area=2 imes 180 + 2 imes 90 +36=576;cm^2\* Hence,;the;required;area;of;paper;needed;for;jacket;is;576;cm^2

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Deependra Verma

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