Question

[anhRic]

2/5 số gà ít hơn 2/3 số vịt là 200 con, 3/4 số gà nhiều hơn 5/12 số vịt là 125 con. Hỏi có bao nhiêu con gà , bao nhiêu con vịt ?

Ai có đáp án chính xác mình tích cho

Answer 1

[Le Thi Khanh Huyen]

Mình không nghĩ ra nên bạn tham khảo nhé :

Nguồn : http://gdthhatinh.violet.vn/

Theo bài ra \(\frac{2}{5}\)số gà ít hơn \(\frac{2}{3}\)số vịt là 200 con

Vậy,  \(\frac{6}{5}\)số gà ít hơn 2 lần số vịt là:

200 x 3 = 600 (con)

Hay \(\frac{3}{5}\)số gà ít hơn vịt là

600 : 2 = 300 con (1)

Mặt khác, \(\frac{3}{4}\)số gà nhiều hơn  \(\frac{5}{12}\)số vịt là 125 con

Nên 9 lần số gà nhiều hơn 5 lần số vịt là:

125 x 12 = 1500 (con)

Hay \(\frac{9}{5}\)số gà nhiều hơn số vịt là:

1500 : 5 = 300 con (2)

Từ (1) và (2) ta có:

\(\frac{9}{5}\)số gà nhiều hơn \(\frac{3}{5}\)số gà số con là

300 + 300 = 600 (con)

Phân số chỉ số phần của 600 con gà là:

 \(\frac{9}{5}-\frac{3}{5}=\frac{6}{5}\)

Số gà là:

600 x 5 : 6 = 500 (con)

Số vịt là:

3 x 500:5 + 300 = 600 (con)

Đáp số: 500 con gà

            600 con vịt

Answer 2

[Cao Nguyên Dung]

500 con gà 

600con vịt 

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