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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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