How many envelopes can be made out of a sheet of paper 100 cm by 75 cm, supposing 1
envelope requires 20 cm by 5 cm piece of paper?
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Area of paper = 100 × 75
= 7500 cm².
Area of envelope = 20 × 5
= 100 cm².
Envelope can be made = 7500/100
= 75 envelopes.
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Answer:
75
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