Question

When making yoghurt, the ratio of starter yogurt to milk should be 1:9. I want to make 1000ml of yoghurt. How much milk should I use?

Answer 1

Answer:

Milk should be 9000ml=9L

Answer 2

Answer:

If the ratio of starter yogurt to milk is 1:9, this means that for every 1 unit of starter yogurt, 9 units of milk are used.

To make 1000ml of yogurt, we need to find out how much milk is needed. Let's call the amount of starter yogurt "x" and the amount of milk "y".

According to the ratio, we know that:

x:y = 1:9

We can use this information to set up a proportion:

x / y = 1 / 9

We know that the amount of starter yogurt we need is x = 1000 ml * 1/10 = 100 ml (since the ratio of starter yogurt to milk is 1:9, and we need a total of 1000 ml of yogurt, then the amount of starter yogurt needed is 1/10 of 1000 ml).

Substituting x = 100 ml into the proportion, we get:

100 ml / y = 1 / 9

Solving for y, we get:

y = 900 ml

Therefore, to make 1000 ml of yogurt with a ratio of 1:9 starter yogurt to milk, you need 100 ml of starter yogurt and 900 ml of milk.