mot be boi dang hinh hop chu nhat co chieu dai 8 m chieu rong 4,8m chieu cao 2,2 m
a) thể tích
b) người ta ghép xung quanh bể bơi và đáy bể bơi bằng loại loại gạch men 4dm tính số viên gạch cần dùng
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a ) Thể tích bể bơi đó là :
8,2 x 4,8 x 2 = 78,72 ( m3 )
Bạn chỉ cần lấy V của bể bơi chìa cho V của gạch men là ra à !Mà nếu chỉ lát ở chỗ Stp của bể bơi thì lấy S từng mặt một chia cho S gạch men .Thế nhé !Chúc bạn học giỏi!
hu vi đáy hình hộp là:
140 : 5 =28 ( m )
Tổng hai chiều là:
28 : 2 = 14 ( m )
Chiều rộng là:
( 14 - 2 ) : 2 = 6 ( m )
Chiều dài là:
6 + 2 = 8 ( m )
Diện tích toàn phần hình hộp là:
140 + ( 8 x 6 ) x 2 = 236 ( m2 )
Đáp số: 236 m2
2. https://olm.vn/hoi-dap/detail/78559547535.html