1. Find the unknown of the following.
z:(z+3) = 5:6
2.The ratio of the weight of red-bean syrup to that of green-bean syrup in a 900g syrup mix ture is 2:1. Find the weights of red-bean syrup and green-bean syrup.
3.A sum of money is divided into two portions in the ratio of 5:7. If the smaller portion is $1300,find the amount of the sum.
F.1 Maths (Ratio) 即日!!! Thanks a lot!!
2007-03-18 8:38 pm
回答 (1)
2007-03-18 8:44 pm
✔ 最佳答案
(1)z / (z+3) = 5 / 6
6z = 5(z+3)
z = 15
(2)
Weight of red-bean syrup = 900 x 2/(1+2) = 600g
Weight of green-bean syrup = 900 x 1/(1+2) = 300g
(3)
Let $A be the amount of the sum
Then,
A x 5/(5+7) = 1300
A = 1300 * 12/5
= 3120
Therefore, the amount of the sum is $3120
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