1.A special tea is produced by mixing tea A, B & C in the ratio of 4 : 5: 1. Given that the weight of tea B in the special tea is 125g , find the weight of the special tea.
2.There are aed balls, yellow balls & green balls in a box. The number of aed balls & yellow balls are in the ratio of 5 : 8.The number of yellow balls and green balls are in the ratio of 6 : 1.
(a)Find the ratio of the number of aed balls, yellow balls &green balls.
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2007-04-16 12:23 am
回答 (3)
2007-04-16 12:45 am
✔ 最佳答案
１．specal tea weight = y5/10y=125g
y=250g
2.(a)aed balls : yellow balls : green balls=15:24:4
(b)yellow balls = 24 x 5=120 green balls = 4x5 = 20
3. there ratio is p:n:a=9:6:14 so their amout is Peter get 180 Nikki get 120 Andy get 280
4.25x3/5 - 25 x 2/5 = 5 m
2007-04-15 17:53:10 補充：
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2007-04-16 12:52 am
1. Let x be the weight of the special tea.
5/(4+5+1) * x = 125g
x/2 = 125g
x =250g
The weight of special tea is 250g
2a. ratio of aed : yellow = 5:8 = 30:48
ratio of yellow : green = 6:1 = 48:8
ratio of aed : yellow : green = 30:48:8
2b. Let x be the total number of balls.
30/(30+48+8) * x = 75
x = 75 * 86 /30 = 215
Number of yellow ball is 215 * 48 / (30+48+8) = 120
Number of green ball is 215 * 8 / (30+48+8) = 20
3. Peter : Nikki = 3 : 2 = 9 : 6
Nikki : Andy = 3 : 7 = 6 : 14
Peter : Nikki : Andy = 9 : 6 :14
Let total = x
Peter gets x * 9/(9+6+14)
Andy gets x * 6/(9+6+14)
x * 9/(9+6+14) - x * 6/(9+6+14) = 100
x * 9 - x * 6 = 2900
x = 966.67
Peter gets = 300
Andy gets = 200
4. First part = 25m * 2/(2+3) = 10m
second part = 25m * 3/(2+3) = 15m
Their difference = 5m
2007-04-15 16:59:15 補充：
Some revision for 3Let total = xPeter gets x * 9/(9 6 14)Nikki gets x * 6/(9 6 14) Andy gets x * 14/(9 6 14)x * 14/(9 6 14) - x * 9/(9 6 14) = 100x = 580Peter gets = 180,Nikki gets = 120,Andy gets = 280
5/(4+5+1) * x = 125g
x/2 = 125g
x =250g
The weight of special tea is 250g
2a. ratio of aed : yellow = 5:8 = 30:48
ratio of yellow : green = 6:1 = 48:8
ratio of aed : yellow : green = 30:48:8
2b. Let x be the total number of balls.
30/(30+48+8) * x = 75
x = 75 * 86 /30 = 215
Number of yellow ball is 215 * 48 / (30+48+8) = 120
Number of green ball is 215 * 8 / (30+48+8) = 20
3. Peter : Nikki = 3 : 2 = 9 : 6
Nikki : Andy = 3 : 7 = 6 : 14
Peter : Nikki : Andy = 9 : 6 :14
Let total = x
Peter gets x * 9/(9+6+14)
Andy gets x * 6/(9+6+14)
x * 9/(9+6+14) - x * 6/(9+6+14) = 100
x * 9 - x * 6 = 2900
x = 966.67
Peter gets = 300
Andy gets = 200
4. First part = 25m * 2/(2+3) = 10m
second part = 25m * 3/(2+3) = 15m
Their difference = 5m
2007-04-15 16:59:15 補充：
Some revision for 3Let total = xPeter gets x * 9/(9 6 14)Nikki gets x * 6/(9 6 14) Andy gets x * 14/(9 6 14)x * 14/(9 6 14) - x * 9/(9 6 14) = 100x = 580Peter gets = 180,Nikki gets = 120,Andy gets = 280
參考: me
2007-04-16 12:36 am
1.125÷10分5=250
2.aed balls: yellow balls : green balls =15 :24 :4
2.aed balls: yellow balls : green balls =15 :24 :4
參考: me
收錄日期: 2021-04-12 22:23:15
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