Question

Người ta xây tường rào xung quanh một mảnh đất hình chữ nhật chiều dài 99 m và chiều rộng 71 m. Bức tường cao 3 m. Cứ mỗi mét vuông tốn 44 000 đồng. Hỏi xây bức tường đó hết tất cả bao nhiêu đồng?

Answer 1

. Bức tường cao 3 m.  mình ko hiểu chỗ này

Answer 2

Diện tích hai bức tường (bức tường có 1 cạnh bằng chiều dài hcn và 1 cạch bằng chiều cao   ) là :

2 x 99 x 3 = 594 m²

Diện tích hai bức tường (bức tường có 1 cạnh bằng chiều  rộng  hcn và 1 cạch bằng chiều cao   ) là :

2 x 71 x 3 = 426 m²

Tổng diện tích cần xây là: 594 + 426 = 1020 m²

Mỗi mét vuông tốn 44 000 đ nên 1020 m² sẽ tốn là: 44 000 x 1020 = 44 880 000 đồng

Đs:..

 

Answer 3

Sửa lại :

Bức tường nên không có mặt trên và mặt dưới.

Chu vi mặt đáy bức tường là :

\(\left(99+71\right)\times2=340\) (m)

Diện tích xung quanh của bức tường là :

\(340\times3=1020\) (m²)

Vậy mất số tiền là :

\(1020\times44000=44880000\) (đồng)

 

Answer 4

44880000 d

Answer 5

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Answer 6

bức tường cao 3m mình ko hiểu bạn ạ

Answer 7

Tính chu vi mảnh đất là: (99+71)•2= 340.Tính diện tích bức tường là: 340•3= 1020 mét vuông.Sau đó tính số tiền xây tường rào là: 1020•44000= 44880000đ

Vậy số tiền cần có để xây hàng rào là 44880000đ

Answer 8

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Answer 9

Lê Quang Phúc ngu vãi 

Bức tường là chiều cao đấy