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2022-08-15 09:23:51
a , Diện tích làm bể là :
[ 80 + 50 ] x 2 x 45 + 80 x 50 =15700 ( cm2 ) = 157 ( dm2 )
b , Đổi : 80 cm = 8 dm 50 cm = 5 dm, 45 cm = 4,5 dm ,35 cm = 3,5 dm
Nếu cho hòn đá thì chiều cao mực nước tăng :
10 : 8 : 5 = 0,25 ( dm )
Mực nước trong bể lúc này cao :
3,5 + 0,25 = 3,75 ( dm )
Đáp số : a, 157 dm2
b, 3,75 dm
2022-07-24 20:00:40
=(1+20).20:2
=210
2022-07-24 19:58:36
because it's young or the author likes that
nếu mà làm vào bài kiểm tra thì lưu ý hehehe
2022-07-22 15:13:48
2022-07-19 20:05:28
tối giản r
2022-07-19 20:02:54
2022-07-12 18:34:53
\(\dfrac{3}{4}-\dfrac{1}{4}+\dfrac{1}{2}=\dfrac{1}{2}+\dfrac{1}{2}=\dfrac{1}{2}\)
2022-07-12 18:31:34
2022-06-11 08:22:43
câu trả lời mình gửi rồi còn sơ đồ thì đợi cao nhân nào có máy xịn nha
còn mình không vẽ đc
2022-06-11 08:16:36
chiều rộng là
36 x 4/6 = 24 m
chu vi là
(36+24)x2=120 m
diện tích là
36.24=864 m vuông
đ/s