{"id":10816,"date":"2021-11-22T17:27:12","date_gmt":"2021-11-22T10:27:12","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=10816"},"modified":"2021-11-22T18:19:50","modified_gmt":"2021-11-22T11:19:50","slug":"bai-toan-vui-ve-trong-luong-cua-may","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/bai-toan-vui-ve-trong-luong-cua-may\/","title":{"rendered":"B\u00e0i to\u00e1n vui v\u1ec1 tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a m\u00e2y?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u0110\u00e3 bao gi\u1edd b\u1ea1n t\u1ef1 h\u1ecfi xem m\u1ed9t \u0111\u1ed1ng tuy\u1ebft x\u1ed1p l\u01a1 l\u1eedng tr\u00ean b\u1ea9u tr\u1eddi n\u1eb7ng bao nhi\u00eau? Hay m\u1ed9t c\u01a1n b\u00e3o thi \u0111\u1ed9 m\u1ea5y t\u1ea5n? M\u1ed9t nh\u00e0 kh\u00ed t\u01b0\u1ee3ng h\u1ecdc M\u1ef9 \u0111\u00e3 th\u1ef1c hi\u1ec7n ph\u00e9p \u01b0\u1edbc l\u01b0\u1ee3ng \u0111\u00f3 v\u00e0 k\u1ebft qu\u1ea3 c\u00f3 th\u1ec3 l\u00e0m b\u1ea1n kinh ng\u1ea1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e3y b\u1eaft \u0111\u1ea9u v\u1edbi m\u1ed9t \u0111\u00e1m m\u00e2y tr\u1eafng x\u1ed1p tr\u1eafng \u0111\u01a1n gi\u1ea3n m\u1ed9t \u0111\u00e1m m\u00e2y t\u00edch. N\u00f3 c\u00f3 th\u1ec3 ch\u1ee9a bao nhi\u00eau n\u01b0\u1edbc trong minh? PeggyLeMone, nh\u00e0 khoa h\u1ecdc cao c\u1ea5p t\u1ea1i Trung t\u00e2m nghi\u00ean c\u1ee9u Kh\u00ed quy\u1ec3n Qu\u1ed1c gia \u1edf Boulder, Colorado, cho bi\u1ebft: \u201cN\u01b0\u1edbc trong m\u1ed9t \u0111\u00e1m m\u00e2y nh\u1ecf c\u00f3 th\u1ec3 n\u1eb7ng kho\u1ea3ng 550 t\u1ea5n. Hay \u0111\u1ec3 d\u1ec5 hinh dung h\u01a1n, b\u1ea1n h\u00e3y li\u00ean t\u01b0\u1edfng n\u00f3 v\u1edbi \u2026 nh\u1eefng con voi. M\u1ed9t con voi trung binh c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng kho\u1ea3ng 6 t\u1ea5n, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 \u0111\u00e1m m\u00e2y t\u00edch n\u1eb7ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng g\u1ea9n 100 con voi\u201d.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00ecnh \u1ea3nh l\u01b0\u1ee3ng n\u01b0\u1edbc kh\u1ed5ng l\u1ed3 b\u1eb1ng 100 con th\u00fa l\u1edbn nh\u1ea5t tr\u00ean \u0111\u1ea5t li\u1ec1n treo l\u01a1 l\u1eedng tr\u00ean b\u1ea9u tr\u1eddi l\u1ea1i g\u1ee3i n\u00ean m\u1ed9t c\u00e2u h\u1ecfi kh\u00e1c: C\u00e1i g\u00ec gi\u1eef ch\u00fang \u1edf \u0111\u00f3. \u201cTr\u01b0\u1edbc ti\u00ean, n\u01b0\u1edbc kh\u00f4ng t\u1ed3n t\u1ea1i \u1edf d\u1ea1ng gi\u1ecdt c\u00f3 k\u00edch c\u1ee1 to nh\u01b0 con voi, m\u00e0 bao g\u1ed3m v\u00f4 v\u00e0n c\u00e1c h\u1ea1t r\u1ea5t r\u1ea5t nh\u1ecf\u201d, LeMone gi\u1ea3i th\u00edch. V\u00e0 nh\u1eefng h\u1ea1t b\u1ee5i n\u01b0\u1edbc n\u00e0y l\u01a1 l\u1eedng trong t\u1ea9ng kh\u00f4ng kh\u00ed \u1ea5m \u0111ang d\u00e2ng l\u00ean \u1edf b\u00ean d\u01b0\u1edbi. Tuy nhi\u00ean, \u00fd ni\u1ec7m v\u1ec1 m\u1ed9t l\u01b0\u1ee3ng n\u01b0\u1edbc l\u1edbn nh\u01b0\u1eddng \u1ea5y treo tr\u00ean b\u1ea9u tr\u1eddi l\u00e0m s\u1eedng s\u1ed1t ngay c\u1ea3 \u0111\u1ed1i v\u1edbi m\u1ed9t nh\u00e0 kh\u00ed t\u01b0\u1ee3ng h\u1ecdc nh\u01b0 LeMone. \u201cT\u00f4i kh\u00f4ng h\u1ec1 c\u00f3 ch\u00fat \u00fd th\u1ee9c n\u00e0o v\u1ec1 tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t \u0111\u00e1m m\u00e2y, cho t\u1edbi khi t\u00f4i b\u1eaft \u0111\u1ea9u t\u00ednh to\u00e1n\u201d, b\u00e0 n\u00f3i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1eady bao nhi\u00eau \u201cch\u00fa voi\u201d m\u00e2y c\u00f3 m\u1eb7t trong m\u1ed9t c\u01a1n d\u00f4ng l\u1edbn.? G\u1ea5p m\u01b0\u1eddi m\u1ea5y l\u1ea9n \u0111\u00e1m m\u00e2y t\u00edch ch\u0103ng? Con s\u1ed1 th\u1ef1c s\u1ebd khi\u1ebfn b\u1ea1n kinh ng\u1ea1c: kho\u1ea3ng 200.000! C\u00f2n trong m\u1ed9t c\u01a1n b\u00e3o l\u1edbn, k\u1ebft qu\u1ea3 c\u00f2n cho\u00e1ng v\u00e1ng h\u01a1n: 4 tri\u1ec7u con voi c\u0169ng ch\u1ec9 n\u1eb7ng nh\u01b0 th\u1ebf. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a r\u1eb1ng n\u01b0\u1edbc trong m\u1ed9t c\u01a1n cu\u1ed3ng phong c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng l\u1edbn h\u01a1n t\u1ea5t c\u1ea3 c\u00e1c con voi tr\u00ean Tr\u00e1i \u0111\u1ea5t c\u1ed9ng l\u1ea1i. C\u00f3 l\u1ebd, c\u00f2n nhi\u1ec1u h\u01a1n t\u1ea5t c\u1ea3 s\u1ed1 voi t\u1eebng t\u1ed3n t\u1ea1i tr\u00ean h\u00e0nh tinh c\u1ee7a ch\u00fang ta.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0110\u00e3 bao gi\u1edd b\u1ea1n t\u1ef1 h\u1ecfi xem m\u1ed9t \u0111\u1ed1ng tuy\u1ebft x\u1ed1p l\u01a1 l\u1eedng tr\u00ean b\u1ea9u tr\u1eddi n\u1eb7ng bao nhi\u00eau? Hay m\u1ed9t c\u01a1n b\u00e3o thi \u0111\u1ed9 m\u1ea5y t\u1ea5n? M\u1ed9t nh\u00e0 kh\u00ed t\u01b0\u1ee3ng h\u1ecdc M\u1ef9 \u0111\u00e3 th\u1ef1c hi\u1ec7n ph\u00e9p \u01b0\u1edbc l\u01b0\u1ee3ng \u0111\u00f3 v\u00e0 k\u1ebft qu\u1ea3 c\u00f3 th\u1ec3 l\u00e0m b\u1ea1n kinh ng\u1ea1c. H\u00e3y b\u1eaft \u0111\u1ea9u v\u1edbi m\u1ed9t \u0111\u00e1m [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[1,15],"tags":[],"class_list":["post-10816","post","type-post","status-publish","format-standard","hentry","category-general","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10816","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=10816"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10816\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=10816"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=10816"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=10816"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}