Ôn tập chương 10 - Một số hình khối trong thực tiễn

Home Toán lớp 7 - Sách KNTT Ôn tập chương 10 - Một số hình khối trong thực tiễnBài tập nâng cao

{"common":{"save":0,"post_id":"5856","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8052","post_id":"5856","mon_id":"1158532","chapter_id":"1158663","question":"T\u1eeb m\u1ed9t kh\u1ed1i g\u1ed7 hình l\u1eadp ph\u01b0\u01a1ng c\u1ea1nh 80cm, ng\u01b0\u1eddi ta c\u1eaft b\u1ecf \u0111i b\u1ed1n hình l\u0103ng tr\u1ee5 \u0111\u1ee9ng tam giác v\u1edbi chi\u1ec1u cao 80cm và \u0111áy là tam giác vuông cân có c\u1ea1nh góc vuông là 15 cm nh\u01b0 hình v\u1ebd. Tính th\u1ec3 tích kh\u1ed1i g\u1ed7 còn l\u1ea1i sau khi c\u1eaft. <\/p><svg height=\"260\" width=\"240\"> <g><title><\/title><rect fill=\"#ffffff\" height=\"262\" id=\"canvas_background\" width=\"242\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><line fill=\"none\" id=\"svg_2\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"82\" x2=\"18\" y1=\"15.25\" y2=\"100.25\"><\/line> <line fill=\"none\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"229\" x2=\"165\" y1=\"15.25\" y2=\"100.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_4\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" 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stroke-width=\"1.5\" x1=\"186\" x2=\"206\" y1=\"160.25\" y2=\"190.25\"><\/line> <\/g> <\/svg><\/span><\/p>","options":["A.<\/strong> 0,512 m³","B.<\/strong> 0,009 m³","C.<\/strong> 0,503 m³","D.<\/strong> 0,476 m³"],"correct":"4","level":"3","hint":"","answer":"Th\u1ec3 tích c\u1ee7a kh\u1ed1i g\u1ed7 hình l\u1eadp ph\u01b0\u01a1ng khi ch\u01b0a b\u1ecb c\u1eaft là<\/p>80 . 80 . 80 = 512 000 cm³ = 0,512 m³<\/p>Th\u1ec3 tích c\u1ee7a m\u1ed9t kh\u1ed1i l\u0103ng tr\u1ee5 \u0111\u01b0\u1ee3c c\u1eaft là<\/p>$\\dfrac{1}{2}$<\/span> . 15 . 15 . 80 = 9000 cm³ = 0,009 m³<\/p>Th\u1ec3 tích còn l\u1ea1i c\u1ee7a kh\u1ed1i g\u1ed7 sau khi c\u1eaft là<\/p>0,512 - 0,009 . 4 = 0,476 m³<\/p>\u0110áp án \u0111úng là    D.<\/strong> 0,476 m³<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-05-20 08:35:37","option_type":"txt","len":2},{"id":"8054","post_id":"5856","mon_id":"1158532","chapter_id":"1158663","question":"T\u1eeb m\u1ed9t kh\u1ed1i g\u1ed7 hình l\u1eadp ph\u01b0\u01a1ng c\u1ea1nh 80cm, ng\u01b0\u1eddi ta c\u1eaft b\u1ecf \u0111i b\u1ed1n hình l\u0103ng tr\u1ee5 \u0111\u1ee9ng tam giác v\u1edbi chi\u1ec1u cao 80cm và \u0111áy là tam giác vuông cân có c\u1ea1nh góc vuông là 15 cm nh\u01b0 hình v\u1ebd. Tính th\u1ec3 tích kh\u1ed1i g\u1ed7 còn l\u1ea1i sau khi c\u1eaft. N\u1ebfu m\u1ed7i mét kh\u1ed1i g\u1ed7 n\u1eb7ng 450 kg thì kh\u1ed1i g\u1ed7 sau khi c\u1eaft n\u1eb7ng bao nhiêu ki-lô-gam?<\/p><svg height=\"260\" width=\"230\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\"> <g><title><\/title><rect fill=\"#fff\" height=\"262\" id=\"canvas_background\" width=\"232\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><image height=\"255\" id=\"svg_1\" width=\"226\" x=\"-1\" 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\" y=\"3.5\"><\/image> <\/g> <\/svg><\/span><\/p>","options":["A. <\/strong>214,2 kg","B.<\/strong> 241,2 kg","C.<\/strong> 221,4 kg","D.<\/strong> 242,1 kg"],"correct":"1","level":"3","hint":"","answer":"Th\u1ec3 tích c\u1ee7a kh\u1ed1i g\u1ed7 hình l\u1eadp ph\u01b0\u01a1ng khi ch\u01b0a b\u1ecb c\u1eaft là<\/p>80 . 80 . 80 = 512 000 cm³ = 0,512 m³<\/p>Th\u1ec3 tích c\u1ee7a m\u1ed9t kh\u1ed1i l\u0103ng tr\u1ee5 \u0111\u01b0\u1ee3c c\u1eaft là<\/p>$\\dfrac{1}{2}$<\/span> . 15 . 15 . 80 = 9000 cm³ = 0,009 m³<\/p>Th\u1ec3 tích còn l\u1ea1i c\u1ee7a kh\u1ed1i g\u1ed7 sau khi c\u1eaft là<\/p>0,512 - 0,009 . 4 = 0,476 m³<\/p>Kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a kh\u1ed1i g\u1ed7 còn l\u1ea1i là<\/p>0,476 . 450 = 214,2 kg<\/p>\u0110áp án \u0111úng là  A. <\/strong>214,2 kg<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-05-20 08:40:58","option_type":"txt","len":1},{"id":"8061","post_id":"5856","mon_id":"1158532","chapter_id":"1158663","question":"M\u1ed9t cái thùng hình l\u1eadp ph\u01b0\u01a1ng c\u1ea1nh 12 dm có ch\u1ee9a n\u01b0\u1edbc, \u0111\u1ed9 sâu c\u1ee7a n\u01b0\u1edbc là 6dm. Ng\u01b0\u1eddi ta th\u1ea3 vào thùng 36 viên g\u1ea1ch d\u1ea1ng hình h\u1ed9p ch\u1eef nh\u1eadt có chi\u1ec1u dài 5dm, chi\u1ec1u r\u1ed9ng 4dm và chi\u1ec1u cao 1dm. H\u1ecfi n\u01b0\u1edbc trong thùng dâng lên cách mi\u1ec7ng thùng bao nhiêu \u0111\u1ec1-xi-mét (gi\u1ea3 s\u1eed toàn b\u1ed9 g\u1ea1ch ng\u1eadp trong n\u01b0\u1edbc và chúng hút n\u01b0\u1edbc không \u0111áng k\u1ec3)?<\/p>","options":["1 dm","2 dm","3 dm","4 dm"],"correct":"1","level":"3","hint":"","answer":"Th\u1ec3 tích n\u01b0\u1edbc có trong thùng là<\/p>12 . 12 . 6 = 864 dm³<\/p>Th\u1ec3 tích c\u1ee7a m\u1ed9t viên g\u1ea1ch là<\/p>5 . 4 . 1 = 20 dm³<\/p>Th\u1ec3 tích c\u1ee7a c\u1ea3 g\u1ea1ch và n\u01b0\u1edbc là<\/p>864 + 36 . 20 = 1584 dm³<\/p>Sau khi th\u1ea3 g\u1ea1ch thì m\u1ef1c n\u01b0\u1edbc trong thùng cao là<\/p>1584 : (12 . 12) = 11 dm<\/p>Sau khi th\u1ea3 g\u1ea1ch vào thì n\u01b0\u1edbc dâng lên cách mi\u1ec7ng thùng là<\/p>12 - 11 = 1 dm<\/p>\u0110áp án \u0111úng là    1 dm<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-05-20 09:14:22","option_type":"txt","len":0}]}