{"common":{"save":0,"post_id":"9108","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5127","post_id":"9108","mon_id":"1159414","chapter_id":"1159500","question":"<p>M\u1ed9t chi\u1ebfc bánh có d\u1ea1ng hình tròn \u0111\u01b0\u1eddng kính 8 cm. Di\u1ec7n tích c\u1ee7a chi\u1ebfc bánh \u0111ó là:<\/p>","options":["<strong>A.<\/strong> 200,96 cm².","<strong>B.<\/strong> 200,96 dm².","<strong>C.<\/strong> 50,24 cm².","<strong>D.<\/strong> 50,24 dm²."],"correct":"3","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> 50,24 cm².<\/span><\/p><p>Bán kính c\u1ee7a chi\u1ebfc bánh là:<\/p><p>8 : 2 = 4 (cm).<\/p><p>Di\u1ec7n tích c\u1ee7a chi\u1ebfc bánh là:<\/p><p>4 x 4 x 3,14 = 50,24 (cm²).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-04-30 15:21:02","option_type":"txt","len":2},{"id":"5129","post_id":"9108","mon_id":"1159414","chapter_id":"1159500","question":"<p>M\u1ed9t m\u1ea3nh sân d\u1ea1ng hình vuông có chu vi là 60 m. Tính di\u1ec7n tích c\u1ee7a m\u1ea3nh sân \u0111ó.<\/p>","options":["<strong>A.<\/strong> 252 m².","<strong>B.<\/strong> 2250 dm².","<strong>C.<\/strong> 3600 dm².","<strong>D.<\/strong> 225 m²."],"correct":"4","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> 225 m².<\/span><\/p><p>\u0110\u1ed9 dài c\u1ea1nh c\u1ee7a m\u1ea3nh sân là:<\/p><p>60 : 4 = 15 (m).<\/p><p>Di\u1ec7n tích c\u1ee7a m\u1ea3nh sân là:<\/p><p>15 x 15 = 225 (m²).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-04-30 15:24:34","option_type":"txt","len":2},{"id":"5131","post_id":"9108","mon_id":"1159414","chapter_id":"1159500","question":"<p>M\u1ed9t hình h\u1ed9p ch\u1eef nh\u1eadt có di\u1ec7n tích xung quanh là 1500 dm². Tính chi\u1ec1u cao c\u1ee7a hình h\u1ed9p ch\u1eef nh\u1eadt bi\u1ebft chi\u1ec1u dài và chi\u1ec1u r\u1ed9ng c\u1ee7a nó l\u1ea7n l\u01b0\u1ee3t là 22 dm và 28 dm.<\/p>","options":["<strong>A.<\/strong> 15 dm.","<strong>B.<\/strong> 16 dm.","<strong>C.<\/strong> 32 dm.","<strong>D.<\/strong> 30 dm."],"correct":"1","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> 15 dm.<\/span><\/p><p>Chu vi \u0111áy là (22 + 28) x 2 = 100 (dm).<\/p><p>Chi\u1ec1u cao c\u1ee7a hình ch\u1eef nh\u1eadt là 1500 : 100 = 15 (dm).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-04-30 15:28:26","option_type":"txt","len":0}]}