How many envelopes can we make out of a sheet of paper 249 cm by 72cm if each envelope requires a peace of paper of size 18cm by 12cm
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let the length and breadth of sheet of paper be L and B.
let the length and breadth of paper required to make the envelope be l and b.
area of sheet=L*B
=249*72
=17928 cm²
area of sheet required for 1 envelope=l*b
=18*12
=216 cm²
no. of envelopes that can be made=(L*B)/(l*b)
=17928/216
=83
so,83 envelopes can be made from the sheet provided.
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