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1. \(7\) persons is to \(49\) persons as \(11 \ k.g\) is to \(88 \ k.g\).
2. \(10\) books is to \(15\) books as \(3\) books is to \(15\) books.
3. If the weight of \(40\) books is \(8 \ k.g\), then the weight of \(15\) books is \(3 \ k.g\).
4. A car travels \(90 \ k.m\) in \(3\) hours with constant speed. It will travel \(140 \ k.m\) in \(5\) hours at the same speed.
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