Question

Một cái bể không chứa nước dạng hình hộp chữ nhật có chiều cao đo trong lòng bể là 8dm , diện tích đáy bể là 7,5m2 . Người ta cho vào bể một sò hòn đá và đổ vào 4800 lít nước thì bể vừa đầy nước . Hỏi số đá trong bể chiếm bao nhiêu phần trăm thể tích của bể ?

Answer 1

                                     Bài giải

                          Đổi: 7,5 m² = 750 dm²

                     Thể tích của bể nước đó là: 

                         750  x 8 = 6 000 (dm³)

             Tổng thể tích của những hòn đá là: 

                    6 000 - 4 800 = 1200 (dm³)

Số đá trong bể chiếm số phần trăm thể tích của bể nước là:

                    1200 : 6000 x 100 = 20 (%)

                  Đáp số: 20% thể tích bể nước.

   Học tốt nhoa ~!!!!!!!!!!!!!!!! ^ - ^

Answer 2

= 20% chị nhé

Answer 3

20 % 

ai k mình mình k lại

Answer 4

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Answer 5

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Answer 6

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