(LTV 2018 – 2019).🌊 Trên một khối gỗ hình lập phương cạnh 20 cm, người ta đục một lỗ hình vuông cạnh 3 cm ở chính giữa, xuyên qua khối gỗ. Tính thể tích phần còn lại của khối gỗ?

Phương pháp giải

- Tìm thể tích khối gỗ hình lập phương cạnh 20 cm - Tìm thể tích khối lập phương cạnh 3 cm - Tìm thể tích phần còn lại của khối gỗ

Lời giải của GV ufaindo.xyz

Thể tích khối gỗ hình lập phương cạnh 20 cm là

20 x 20 x 20 = 8000 (cm³)

Thể tích khối lập phương cạnh 3 cm là

3 x 3 x 3 = 27 (cm³)

Thể tích phần còn lại của khối gỗ là

8000 – 27 = 7973 (cm³)

Đáp số: 7973 cm³

Báo lỗi - Góp ý

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(LTV 2018 – 2019).🌊 Trên một khối gỗ hình lập phương cạnh 20 cm, người ta đục một lỗ hình vuông cạnh 3 cm ở chính giữa, xuyên qua khối gỗ. Tính thể tích phần còn lại của khối gỗ?

(LTV 2018 – 2019).🌊 Trên một khối gỗ hình lập phương cạnh 20 cm, người ta đục một lỗ hình vuông cạnh 3 cm ở chính giữa, xuyên qua khối gỗ. Tính thể tích phần còn lại của khối gỗ?