Diện tích xung quanh và diện tích toàn phần của hình hộp chữ nhật

Home Lớp 5 Toán lớp 5 - Sách Kết nối tri thức Bài 50: Diện tích xung quanh và diện tích toàn phần của hình hộp chữ nhậtBài tập nâng cao

{"common":{"save":0,"post_id":"8407","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"4573","post_id":"8407","mon_id":"1159414","chapter_id":"1159497","question":"M\u1ed9t h\u1ed9p gi\u1ea5y d\u1ea1ng hình h\u1ed9p ch\u1eef nh\u1eadt không có n\u1eafp. H\u1ed9p có chi\u1ec1u dài là 14 cm, chi\u1ec1u r\u1ed9ng là 8 cm và chi\u1ec1u cao là 12 cm. Tính di\u1ec7n tích c\u1ee7a ph\u1ea7n gi\u1ea5y dùng \u0111\u1ec3 làm h\u1ed9p bi\u1ebft di\u1ec7n tích mép g\u1ea5p b\u1eb1ng 10% di\u1ec7n tích t\u1ea5t c\u1ea3 các m\u1eb7t c\u1ee7a h\u1ed9p.<\/p>","options":["A.<\/strong> 640 cm²","B.<\/strong> 528 cm²","C.<\/strong> 752 cm²","D.<\/strong> 704 cm²"],"correct":"4","level":"3","hint":"","answer":"Ch\u1ecdn D.<\/strong> 704 cm².<\/span><\/p>Di\u1ec7n tích xung quanh c\u1ee7a h\u1ed9p là (14 + 8) x 2 x 12 = 528 (cm²).<\/p>Vì h\u1ed9p không có n\u1eafp nên di\u1ec7n tích m\u1ed9t \u0111áy c\u1ee7a h\u1ed9p là 14 x 8 = 112 (cm²).<\/p>Di\u1ec7n tích t\u1ea5t c\u1ea3 các m\u1eb7t c\u1ee7a h\u1ed9p là 528 + 112 = 640 (cm²).<\/p>Di\u1ec7n tích ph\u1ea7n mép g\u1ea5p là 640 x 10 : 100 = 64 (cm²).<\/p>Di\u1ec7n tích gi\u1ea5y c\u1ea7n dùng là 640 + 64 = 704 (cm²).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-02-12 09:43:55","option_type":"txt","len":1},{"id":"4582","post_id":"8407","mon_id":"1159414","chapter_id":"1159497","question":"M\u1ed9t b\u1ec3 cá d\u1ea1ng hình h\u1ed9p ch\u1eef nh\u1eadt \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf không n\u1eafp. B\u1ec3 cá có chi\u1ec1u dài 2,5 m ; chi\u1ec1u r\u1ed9ng 1 m và chi\u1ec1u cao 1,5 m. Bi\u1ebft 1 m² kính có giá là 500 000 \u0111\u1ed3ng. Tính s\u1ed1 ti\u1ec1n mua kính \u0111\u1ec3 làm b\u1ec3 cá \u0111ó.<\/p>","options":["A.<\/strong> 6 500 000 \u0111\u1ed3ng","B.<\/strong> 65 000 000 \u0111\u1ed3ng","C.<\/strong> 13 000 000 \u0111\u1ed3ng","D.<\/strong> 1 300 000 \u0111\u1ed3ng"],"correct":"1","level":"3","hint":"","answer":"Ch\u1ecdn A.<\/strong> 6 500 000 \u0111\u1ed3ng.<\/span><\/p>Di\u1ec7n tích xung quanh c\u1ee7a b\u1ec3 cá là (2,5 + 1) x 2 x 1,5 = 10,5 (m²).<\/p>Vì b\u1ec3 không có n\u1eafp nên di\u1ec7n tích m\u1ed9t \u0111áy c\u1ee7a b\u1ec3 là 2,5 x 1 = 2,5 (m²).<\/p>Di\u1ec7n tích kính c\u1ea7n dùng là 10,5 + 2,5 = 13 (m²).<\/p>S\u1ed1 ti\u1ec1n mua kính là 13 x 500 000 = 6 500 000 (\u0111\u1ed3ng).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-02-13 08:48:04","option_type":"txt","len":2},{"id":"4584","post_id":"8407","mon_id":"1159414","chapter_id":"1159497","question":"M\u1ed9t khuôn bánh ch\u01b0ng có d\u1ea1ng m\u1ed9t hình h\u1ed9p ch\u1eef nh\u1eadt không có hai \u0111áy. Khuôn bánh có chi\u1ec1u dài và chi\u1ec1u r\u1ed9ng \u0111\u1ec1u b\u1eb1ng 18 cm và chi\u1ec1u cao b\u1eb1ng 5 cm. H\u1ecfi thanh g\u1ed7 trong hình nào d\u01b0\u1edbi \u0111ây phù h\u1ee3p \u0111\u1ec3 làm khuôn bánh ch\u01b0ng \u0111ó?<\/p>","options":["A.<\/strong> <svg height=\"60\" width=\"220\"> <g>\n<title><\/title>\n<rect fill=\"none\" height=\"62\" id=\"canvas_background\" width=\"222\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_4\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>\n<title><\/title>\n<rect fill=\"#7f3f00\" height=\"25\" id=\"svg_1\" stroke=\"#7f0000\" stroke-width=\"1.5\" width=\"140\" x=\"19\" y=\"24.25\"><\/rect> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_2\" stroke=\"#7f0000\" stroke-width=\"0\" text-anchor=\"start\" x=\"177\" xml:space=\"preserve\" y=\"42.25\">5 cm<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_3\" stroke=\"#7f0000\" stroke-width=\"0\" text-anchor=\"start\" x=\"69\" xml:space=\"preserve\" y=\"17.25\">70 cm<\/text> <\/g> <\/svg><\/span>","B.<\/strong> <svg height=\"60\" width=\"220\"> <g>\n<title><\/title>\n<rect fill=\"none\" height=\"62\" id=\"canvas_background\" width=\"222\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_2\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>\n<title><\/title>\n<rect fill=\"#bf5f00\" height=\"25\" id=\"svg_1\" stroke=\"#7f0000\" stroke-width=\"1.5\" width=\"150\" x=\"19\" y=\"22.25\"><\/rect> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_3\" stroke=\"#7f0000\" stroke-width=\"0\" text-anchor=\"start\" x=\"182\" xml:space=\"preserve\" y=\"42.25\">5 cm<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_4\" stroke=\"#7f0000\" stroke-width=\"0\" text-anchor=\"start\" x=\"71\" xml:space=\"preserve\" y=\"15.25\">72 cm<\/text> <\/g> <\/svg><\/span>","C.<\/strong> <svg height=\"60\" width=\"220\"> <g>\n<title><\/title>\n<rect fill=\"none\" height=\"62\" id=\"canvas_background\" width=\"222\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_4\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>\n<title><\/title>\n<rect fill=\"#7f3f00\" height=\"25\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"120\" x=\"24\" y=\"22.25\"><\/rect> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"154\" xml:space=\"preserve\" y=\"39.25\">5 cm<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"66\" xml:space=\"preserve\" y=\"15.25\">60 cm<\/text> <\/g> <\/svg><\/span>","D.<\/strong> <svg height=\"60\" width=\"220\"> <g>\n<title><\/title>\n<rect fill=\"none\" height=\"62\" id=\"canvas_background\" width=\"222\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_4\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>\n<title><\/title>\n<rect fill=\"#ff7f00\" height=\"25\" id=\"svg_1\" stroke=\"#0f0f00\" stroke-width=\"1.5\" width=\"128\" x=\"29\" y=\"20.25\"><\/rect> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_2\" stroke=\"#0f0f00\" stroke-width=\"0\" text-anchor=\"start\" x=\"166\" xml:space=\"preserve\" y=\"39.25\">5 cm<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_3\" stroke=\"#0f0f00\" stroke-width=\"0\" text-anchor=\"start\" x=\"73\" xml:space=\"preserve\" y=\"14.25\">64 cm<\/text> <\/g> <\/svg><\/span>"],"correct":"2","level":"3","hint":"","answer":"Ch\u1ecdn B.<\/strong><\/span> <svg height=\"60\" width=\"220\"> <g> <title><\/title> <rect fill=\"none\" height=\"62\" id=\"canvas_background\" width=\"222\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_2\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g> <title><\/title> <rect fill=\"#bf5f00\" height=\"25\" id=\"svg_1\" stroke=\"#7f0000\" stroke-width=\"1.5\" width=\"150\" x=\"19\" y=\"22.25\"><\/rect> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_3\" stroke=\"#7f0000\" stroke-width=\"0\" text-anchor=\"start\" x=\"182\" xml:space=\"preserve\" y=\"42.25\">5 cm<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_4\" stroke=\"#7f0000\" stroke-width=\"0\" text-anchor=\"start\" x=\"71\" xml:space=\"preserve\" y=\"15.25\">72 cm<\/text> <\/g> <\/svg><\/span>.<\/span><\/p>Di\u1ec7n tích xung quanh c\u1ee7a khuôn bánh là (18 + 18) x 2 x 5 = 360 (cm²).<\/p>\u0110\u1ec3 làm \u0111\u01b0\u1ee3c khuôn bánh thì thanh g\u1ed7 ph\u1ea3i có di\u1ec7n tích b\u1eb1ng di\u1ec7n tích xung quanh c\u1ee7a khuôn.<\/p>Suy ra chi\u1ec1u dài c\u1ee7a thanh g\u1ed7 là 360 : 5 = 72 (cm).<\/p>","type":"choose_img","extra_type":"","time":"0","user_id":"131","test":"0","date":"2025-02-13 09:11:19"}]}