{"common":{"save":0,"post_id":"9124","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5209","post_id":"9124","mon_id":"1159414","chapter_id":"1159500","question":"<p>M\u1ed9t chi\u1ebfc thuy\u1ec1n xuôi dòng t\u1eeb b\u1ebfn A \u0111\u1ebfn b\u1ebfn B cách nhau 80 km v\u1edbi v\u1eadn t\u1ed1c 40 km\/h. Sau \u0111ó thuy\u1ec1n ng\u01b0\u1ee3c dòng t\u1eeb b\u1ebfn B v\u1ec1 b\u1ebfn A v\u1edbi v\u1eadn t\u1ed1c 25 km\/h. Th\u1eddi gian v\u1ec1 dài h\u01a1n th\u1eddi gian \u0111i là:<\/p>","options":["<strong>A.<\/strong> 1,2 gi\u1edd.","<strong>B.<\/strong> 1,5 gi\u1edd.","<strong>C.<\/strong> 3,2 gi\u1edd.","<strong>D.<\/strong> 0,5 gi\u1edd."],"correct":"1","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> 1,2 gi\u1edd.<\/span><\/p><p>Th\u1eddi gian \u0111i t\u1eeb b\u1ebfn A \u0111\u1ebfn b\u1ebfn B là 80 : 40 = 2 (gi\u1edd).<\/p><p>Th\u1eddi gian \u0111i t\u1eeb b\u1ebfn B v\u1ec1 b\u1ebfn A là 80 : 25 = 3,2 (gi\u1edd).<\/p><p>Th\u1eddi gian v\u1ec1 dài h\u01a1n th\u1eddi gian \u0111i là 3,2 – 2 = 1,2 (gi\u1edd).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-05-01 11:14:00","option_type":"txt","len":1},{"id":"5211","post_id":"9124","mon_id":"1159414","chapter_id":"1159500","question":"<p>M\u1ed9t chi\u1ebfc xe t\u1ea3i \u0111i giao hàng t\u1eeb nhà kho A qua các \u0111i\u1ec3m giao hàng B, C, D r\u1ed3i quay l\u1ea1i kho A (nh\u01b0 hình v\u1ebd). Bi\u1ebft v\u1eadn t\u1ed1c c\u1ee7a xe t\u1ea3i là 50 km\/h và t\u1ea1i m\u1ed7i \u0111i\u1ec3m giao hàng, xe d\u1eebng l\u1ea1i \u0111úng 10 phút. T\u1ed5ng th\u1eddi gian \u0111i và giao hàng c\u1ee7a xe là:<\/p><p><span class=\"svgedit\"><svg height=\"200\" width=\"320\"> <g><title><\/title><rect fill=\"#fff\" height=\"202\" id=\"canvas_background\" width=\"322\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_11\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><ellipse cx=\"106.89999\" cy=\"26.15\" fill=\"#aaffaa\" id=\"svg_3\" rx=\"20\" ry=\"20.5\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\"><\/ellipse> <ellipse cx=\"267.89999\" cy=\"41.64999\" fill=\"#aaaaff\" id=\"svg_4\" rx=\"20\" ry=\"20\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\"><\/ellipse> <g id=\"svg_6\"> <path d=\"m67.77644,137.36788l-7.77684,-7.75615l0,-18.52408l-6.66695,0l0,11.87487l-15.55622,-15.51484l-30,29.92021l7.14189,-0.16971l0,30.2495l45.39875,0l0,-30.07979l7.45936,0l0.00001,-0.00001zm-30,25.75337l-14.8146,0l0,-17.73124l14.8146,0l0,17.73124zm14.39299,-7.5991l-9.73502,0l0,-10.23853l9.73502,0l0,10.23853z\" fill=\"#ffaa56\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\"><\/path> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_2\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"27.9\" xml:space=\"preserve\" y=\"139.64999\">A<\/text> <\/g> <line fill=\"none\" id=\"svg_7\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"3\" x1=\"43.89999\" x2=\"92.9\" y1=\"111.64999\" y2=\"41.65\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_8\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"3\" x1=\"125.89999\" x2=\"247.89999\" y1=\"28.65\" y2=\"39.65\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_9\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"3\" x1=\"269.89999\" x2=\"264.89999\" y1=\"60.64999\" y2=\"163.64999\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_10\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"3\" x1=\"246.9\" x2=\"59.89999\" y1=\"180.64999\" y2=\"154.64999\"><\/line> <ellipse cx=\"264.39999\" cy=\"177.14999\" fill=\"#ff5656\" id=\"svg_5\" rx=\"20.5\" ry=\"20\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\"><\/ellipse> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"20\" id=\"svg_12\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" style=\"cursor: text;\" text-anchor=\"start\" x=\"16.89999\" xml:space=\"preserve\" y=\"69.64999\">20 km<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"20\" id=\"svg_13\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"168.89999\" xml:space=\"preserve\" y=\"26.64999\">30 km<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"20\" id=\"svg_14\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"208.89999\" xml:space=\"preserve\" y=\"115.64999\">15 km<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"20\" id=\"svg_15\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"119.89999\" xml:space=\"preserve\" y=\"190.64999\">35 km<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_16\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"97.89999\" xml:space=\"preserve\" y=\"32.64999\">B<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_17\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"258.89999\" xml:space=\"preserve\" y=\"49.64999\">C<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" font-weight=\"bold\" id=\"svg_18\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"255.89999\" xml:space=\"preserve\" y=\"185.64999\">D<\/text> <\/g> <\/svg><\/span><\/p>","options":["<strong>A.<\/strong> 3 gi\u1edd 20 phút.","<strong>B.<\/strong> 2 gi\u1edd 50 phút.","<strong>C.<\/strong> 3 gi\u1edd 10 phút.","<strong>D.<\/strong> 2 gi\u1edd 30 phút."],"correct":"4","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> 2 gi\u1edd 30 phút.<\/span><\/p><p>T\u1ed5ng quãng \u0111\u01b0\u1eddng mà xe \u0111i là:<\/p><p>20 + 30 + 15 + 35 = 100 (km).<\/p><p>Th\u1eddi gian xe \u0111i không tính th\u1eddi gian giao hàng là:<\/p><p>100 : 50 = 2 (gi\u1edd).<\/p><p>T\u1ed5ng th\u1eddi gian \u0111i và giao hàng c\u1ee7a xe t\u1ea3i là:<\/p><p>2 gi\u1edd + (10 x 3) phút = 2 gi\u1edd 30 phút.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-05-01 11:26:46","option_type":"txt","len":2},{"id":"5213","post_id":"9124","mon_id":"1159414","chapter_id":"1159500","question":"<p>B\u1ebfn A cách b\u1ebfn B 135 km. M\u1ed9t chi\u1ebfc tàu \u0111i t\u1eeb b\u1ebfn A \u0111\u1ebfn b\u1ebfn B v\u1edbi v\u1eadn t\u1ed1c 27 km\/h. H\u1ecfi sau khi kh\u1edfi hành 3 gi\u1edd 30 phút thì tàu còn cách b\u1ebfn B bao nhiêu ki-lô-mét?<\/p>","options":["<strong>A.<\/strong> 38,5 km.","<strong>B.<\/strong> 41,5 km.","<strong>C.<\/strong> 40,5 km.","<strong>D.<\/strong> 40 km."],"correct":"3","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> 40,5 km.<\/span><\/p><p>\u0110\u1ed5i: 3 gi\u1edd 30 phút = 3,5 gi\u1edd.<\/p><p>Quãng \u0111\u01b0\u1eddng tàu \u0111i \u0111\u01b0\u1ee3c sau khi kh\u1edfi hành 3 gi\u1edd 30 phút là:<\/p><p>27 x 3,5 = 94,5 (km).<\/p><p>Tàu còn cách b\u1ebfn B s\u1ed1 ki-lô-mét là:<\/p><p>135 – 94,5 = 40,5 (km).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-05-01 11:32:40","option_type":"txt","len":1}]}