{"common":{"save":0,"post_id":"5850","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8038","post_id":"5850","mon_id":"1158532","chapter_id":"1158663","question":"<p>M\u1ed9t b\u1ec3 n\u01b0\u1edbc có d\u1ea1ng hình h\u1ed9p ch\u1eef nh\u1eadt có chi\u1ec1u dài 2,5m. Lúc \u0111\u1ea7u b\u1ec3 không có n\u01b0\u1edbc. Sau khi \u0111\u1ed5 vào b\u1ec3 120 thùng n\u01b0\u1edbc, m\u1ed7i thùng ch\u1ee9a 30 lít n\u01b0\u1edbc thì m\u1ef1c n\u01b0\u1edbc trong b\u1ec3 cao 1,2m. Tính chi\u1ec1u r\u1ed9ng c\u1ee7a b\u1ec3 n\u01b0\u1edbc.<\/p>","options":["<strong>A.<\/strong> 12 m","<strong>B.<\/strong> 1200 m","<strong>C. <\/strong>120 m","<strong>D. <\/strong>1,2 m"],"correct":"4","level":"3","hint":"","answer":"<p>Th\u1ec3 tích n\u01b0\u1edbc \u0111ã \u0111\u1ed5 vào b\u1ec3 là<\/p><p>120 . 30 = 3600 lít = 3600 dm³ = 3,6 m³<\/p><p>Chi\u1ec1u r\u1ed9ng c\u1ee7a b\u1ec3 là<\/p><p>3,6 : (2,5 . 1,2) = 1,2 m<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>D. <\/strong>1,2 m<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-05-18 08:57:53","option_type":"txt","len":0},{"id":"8039","post_id":"5850","mon_id":"1158532","chapter_id":"1158663","question":"<p>M\u1ed9t b\u1ec3 n\u01b0\u1edbc có d\u1ea1ng hình h\u1ed9p ch\u1eef nh\u1eadt có chi\u1ec1u dài 2,5m. Lúc \u0111\u1ea7u b\u1ec3 không có n\u01b0\u1edbc. Sau khi \u0111\u1ed5 vào b\u1ec3 120 thùng n\u01b0\u1edbc, m\u1ed7i thùng ch\u1ee9a 30 lít n\u01b0\u1edbc thì m\u1ef1c n\u01b0\u1edbc trong b\u1ec3 cao 1,2m. Lát sau ng\u01b0\u1eddi ta \u0111\u1ed5 thêm vào b\u1ec3 80 thùng n\u01b0\u1edbc n\u1eefa thì b\u1ec3 \u0111\u1ea7y. H\u1ecfi b\u1ec3 cao bao nhiêu mét?<\/p>","options":["<strong>A.<\/strong> 20 m","<strong>B. <\/strong>2 m","<strong>C.<\/strong> 200 m","<strong>D. <\/strong>0,2 m"],"correct":"2","level":"3","hint":"","answer":"<p>Th\u1ec3 tích n\u01b0\u1edbc \u0111\u1ed5 vào b\u1ec3 \u0111\u1ec3 m\u1ef1c n\u01b0\u1edbc cao 1,2m là<\/p><p>120 . 30 = 3600 lít = 3600 dm³ = 3,6 m³<\/p><p>Chi\u1ec1u r\u1ed9ng c\u1ee7a b\u1ec3 n\u01b0\u1edbc là<\/p><p>3,6 : (2,5 . 1,2) = 1,2 m<\/p><p>Vì \u0111\u1ed5 thêm 80 thùng n\u1eefa thì b\u1ec3 \u0111\u1ea7y nên th\u1ec3 tích c\u1ee7a b\u1ec3 là<\/p><p>(120 + 80) . 30 = 6000 lít = 6000 dm³ = 6 m³<\/p><p>Chi\u1ec1u cao c\u1ee7a b\u1ec3 là<\/p><p>6 : (2,5 . 1,2) = 2 m<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>B. <\/strong>2 m<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-05-18 09:07:34","option_type":"txt","len":0},{"id":"8040","post_id":"5850","mon_id":"1158532","chapter_id":"1158663","question":"<p>Bác An thuê th\u1ee3 s\u01a1n xung quanh b\u1ed1n m\u1eb7t ngoài c\u1ee7a thành b\u1ec3 n\u01b0\u1edbc có d\u1ea1ng hình h\u1ed9p ch\u1eef nh\u1eadt có chi\u1ec1u dài 4m, chi\u1ec1u r\u1ed9ng 3m và chi\u1ec1u cao 2m v\u1edbi giá 25000 \u0111\u1ed3ng\/m². H\u1ecfi bác An ph\u1ea3i tr\u1ea3 chi phí là bao nhiêu?<\/p>","options":["<strong>A. <\/strong>400 000 \u0111\u1ed3ng","<strong>B. <\/strong>500 000 \u0111\u1ed3ng","<strong>C.<\/strong> 600 000 \u0111\u1ed3ng","<strong>D.<\/strong> 700 000 \u0111\u1ed3ng"],"correct":"4","level":"3","hint":"","answer":"<p>Di\u1ec7n tích xung quanh c\u1ee7a b\u1ec3 là<\/p><p>2 . (4 + 3) . 2 = 28 m²<\/p><p>Chi phí bác An ph\u1ea3i tr\u1ea3 là<\/p><p>28 . 25000 = 700 000 \u0111\u1ed3ng<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>D.<\/strong> 700 000 \u0111\u1ed3ng<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-05-18 09:15:59","option_type":"txt","len":1}]}