{"id":"aqua_rat:0d4a6c02e0728a80389f179e687e6dc1","source_id":"aqua_rat","source_item_id":"0d4a6c02e0728a80389f179e687e6dc1","external_id":null,"program":null,"section":"math","category_code":"PHM","category":"Preparing for Higher Math","subcategory_code":null,"subcategory":null,"form_id":null,"passage_id":null,"position":null,"scored":true,"layout_warning":null,"stem":"Solution A has 5% salt concentration and remaining water. After heating 50 litres of Solution A at a certain temperature, due to evaporation, the salt concentration increases to 10%. The amount of water remaining in the solution would be","stimulus":"","stimulus_html":null,"stem_html":"<p>Solution A has 5% salt concentration and remaining water. After heating 50 litres of Solution A at a certain temperature, due to evaporation, the salt concentration increases to 10%. The amount of water remaining in the solution would be</p>","rationale_html":"<p>Before Evaporation:</p><p>Salt : 5% of 50 litre = 2.5 litre</p><p>Water: 95% of 50 litre = 47.5 litre</p><p>After Evaporation:</p><p>Salt concentration is 10%. Now the salt content will not change after evaporation. So 2.5 litre = 10% of 25 litre.</p><p>Hence, remaining water = 25 litre - 2.5 litre = 22.5 litre</p><p>Answer is D</p>","correct_answer":["D"],"equiv_key":"be51753a73f26d0b057f0ccd","has_media":false,"has_mathml":false,"has_table":false,"section_label":"Mathematics","options":[{"label":"A","content_html":"<p>30 litres</p>","ord":0},{"label":"B","content_html":"<p>27 litres</p>","ord":1},{"label":"C","content_html":"<p>25 litres</p>","ord":2},{"label":"D","content_html":"<p>22.5 litres</p>","ord":3},{"label":"E","content_html":"<p>20 litres</p>","ord":4}],"passage":null,"attribution":{"source_id":"aqua_rat","source_name":"AQuA-RAT algebra word problems with rationales","rights_holder":"Google DeepMind and the AQuA-RAT contributors","canonical_url":"https://github.com/google-deepmind/AQuA","retrieved_from":"https://raw.githubusercontent.com/google-deepmind/AQuA/master/","attribution":"Algebra word problems from the AQuA-RAT dataset (Ling et al., 2017), published by Google DeepMind under the Apache License 2.0.","disclaimer":"AQuA-RAT items are crowdsourced algebra problems, not ACT questions. They carry five answer choices in the pre-2025 ACT Mathematics style and no ACT reporting category. Useful for drilling Preparing for Higher Math content; not a substitute for a real form.","license":"Apache License 2.0. Crowdsourced by DeepMind and published for free use, including commercially.","redistributable":true,"item_count":508},"equivalents":[]}