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a machine can make 450 balls of yarn in 3 hours . at this rate , how long does it take the machine to 1,050 balls of yarn.
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a machine can make 450 balls of yarn in 3 hours . at this rate , how long does it take the machine to 1,050 balls of yarn.

User Mgibsonbr
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7 hours, because in one hour the machine can make 150 so 1050 divided by 150 equals 7
User Soumen
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