How many millilitres of flour are there in half a litre of the mixutre, (3 parts flour 7 parts water)?

Question

IN a mixutre of flour and water, there are 3 parts of flour to 7 parts of water:

How many millilitres of flour are there in half a litre of the mixture?

Also when you answer it could you please tell me how to do it so I can learn and not just get the answers, thanks in advance :D

Answer 1

Ok! Flour is not soluble.
500 ml in half a litre.
Add the 3 parts to the 7 parts=10
divide 500 by ten gives 50, then .x3 for the flour ratio = 150ml of flour.

Answer 2

Provided the 3 and 7 parts are volume (if they were weight, there was no solution to the question!) you calculate as following:
Milli means 1/1000, one litre has therefore 1000 millilitres, half a litre has 500 millilitres.
3 parts and 7 parts make 10 parts, which means, that each part has 50 ml. (500 : 10) Flour is 3 parts = 150 ml

Answer 3

First of all you have to work out how many millilitres there are in half a littre. 1000ml = 1litre and therefore half a litre - 500ml

If there are three parts flour to 7 parts water, there are 10 parts altogether. In half a litre therefore each part is 500/10 = 50.

Therefore there will be 3 x 50 parts of flour ie 150ml

and 7 x 50 parts of water = 350ml

(you can double check this is right 350+150 = 500)

Hope this helps.

Answer 4

7 parts plus 3 parts = 10 parts, A 'part' could be any size, its just a proportion. But in this case we know that the 10 parts = 500 ml. Therfore one part must equal 50ml. There are 3 parts of flour so the total flour must be 3x50ml =150 ml.