The automatic machine for packing of wafers in 4 minutes packs 320 packs of wafers. How many packs of wafers will release the automatic machine in 9 minutes?

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320:4=85 packs of wafers pack the automatic machine in 1 minute of 85X9=7651)320:4=80 (packs) - in 1 minute. 2) 80*9=720 (packs) - In 9 minutes. Answer: 720 packs of wafers will be released by the automatic machine in 9 minutes.
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Answer add