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Mathematics 18 Online
OpenStudy (anonymous):

a copy machine makes 36 copies per minute,how many copies does it make in 3 minutes and 30 seconds?

OpenStudy (nubeer):

in 30 secs it will make 18 copies.. and in one minute it makes 36 copies so in 3 min and 30 secs = 36+36+36+18

OpenStudy (anonymous):

126

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