{"common":{"save":0,"post_id":"9122","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5170","post_id":"9122","mon_id":"1159414","chapter_id":"1159500","question":"<p>\u0110\u1ed5i:<\/p><p>270 km\/h = <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/> m\/s.<\/p><p>54 km\/h = <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/> m\/s.<\/p>","options":"","correct":["[\"75\",\"15\"]"],"level":"1","hint":"<p>270 km = 270 000 m<\/p><p>1h = 3600s<\/p>","answer":"<p>270 km\/h = (270 000 : 3600) m\/s = 75 m\/s.<\/p><p>54 km\/h = (54 000 : 3600) m\/s = 15 m\/s.<\/p><p>Các s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u1ea7n l\u01b0\u1ee3t là <span style=\"color:#16a085;\"><strong>75<\/strong> <\/span>và <span style=\"color:#16a085;\"><strong>15<\/strong><\/span>.<\/p>","type":"blank","extra_type":"","time":"0","user_id":"131","test":"0","date":"2025-05-01 09:23:29"},{"id":"5171","post_id":"9122","mon_id":"1159414","chapter_id":"1159500","question":"<p>M\u1ed9t con \u0111à \u0111i\u1ec3u có th\u1ec3 ch\u1ea1y 12,6 km trong 12 phút. Tính v\u1eadn t\u1ed1c ch\u1ea1y c\u1ee7a con \u0111à \u0111i\u1ec3u \u0111ó (theo \u0111\u01a1n v\u1ecb km\/h). <\/p>","options":["<strong>A.<\/strong> 1,05 km\/h.","<strong>B.<\/strong> 64 km\/h.","<strong>C.<\/strong> 10,5 km\/h.","<strong>D.<\/strong> 63 km\/h."],"correct":"4","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> 63 km\/h.<\/span><\/p><p>\u0110\u1ed5i: 12 phút = 0,2 gi\u1edd.<\/p><p>V\u1eadn t\u1ed1c ch\u1ea1y c\u1ee7a con \u0111à \u0111i\u1ec3u là 12,6 : 0,2 = 63 (km\/h).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-05-01 09:29:51","option_type":"txt","len":1},{"id":"5173","post_id":"9122","mon_id":"1159414","chapter_id":"1159500","question":"<p>M\u1ed9t ng\u01b0\u1eddi \u0111i b\u1ed9 v\u1edbi v\u1eadn t\u1ed1c 1,2 m\/s. Trong 5 phút ng\u01b0\u1eddi \u0111ó \u0111i \u0111\u01b0\u1ee3c quãng \u0111\u01b0\u1eddng dài bao nhiêu mét?<\/p>","options":["<strong>A.<\/strong> 360 m.","<strong>B.<\/strong> 306 m.","<strong>C.<\/strong> 6 m.","<strong>D.<\/strong> 60 m."],"correct":"1","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> 360 m.<\/span><\/p><p>\u0110\u1ed5i: 5 phút = 300 giây.<\/p><p>Trong 5 phút ng\u01b0\u1eddi \u0111ó \u0111i \u0111\u01b0\u1ee3c s\u1ed1 mét là 1,2 x 300 = 360 (m).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-05-01 09:33:06","option_type":"txt","len":0}]}
