How many envelopes can be made out of a sheet of paper 3 m 24 cm by 1 m 72 cm , if each envelope requires a piece of paper of size 18 cm by 12 cm ?

Breadth of sheet of paper=172cm

Area of sheet paper=lxb=324x172 cm2

Area of the piece of paper required for on envelope=18x12 cm2

Number of envelopes=$\frac{324\times 172}{18\times 12}$

=258

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