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Mathematics, 14.12.2020 21:10 ava5015

If Jim Roller can paint a room in 3 hours while John Brush would take 4 hours, how long will they take if they work together? 1 5/7 hours
1 hour
1/7 hour

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If Jim Roller can paint a room in 3 hours while John Brush would take 4 hours, how long will they ta...
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