Tìm kiếm
Anh Tuan
4 tháng trước

Một khu vườn hình chữ nhật có diện tích 900m2 và chu vi 122m. Tìm chiều dài và chiều rộng của khu vườn.

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vuide315369
4 tháng trước

Đáp án:

 

Giải thích các bước giải:

Chu vi = 122 m.
⇒ Nửa chu vi = 61 m.
Đặt chiều rộng là a, chiều dài là: b.
Có: a . b = 900.
      a + b = 61.
Giải hệ sẽ tính được b=25, a=36.

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