It won't give u exactly 30 more like 35 vol if u mix 20 and 40. If u want closer to 30 put a little more 20 then 40...
20
Your dimensions are for a square. You need one more dimension for a box.
It is: (20*10)-(20+10) =170
7 liters of a 20% acid solution consists of 1.4 liters of acid (20% of the total volume) mixed with 5.6 liters of water (80% of the total volume). The amount of acid isn't going to change in the new solution. You are just going to add enough water to make it a 10% solution instead of a 20% solution. So it will be more dilute. That means that 1.4 liters of acid will represent 1/10 of the volume of the new solution. So the total volume of the new solution will be 10 x 1.4 or 14 liters. The amount of water in the new solution will be 14 - 1.4 = 12.6 liters. That is a difference of 12.6 - 5.6 = 7 liters from the amount of water you started with. So you need to add 7 liters of water to the original 20% solution to make it a 10% solution. This makes sense because if you double the amount of the mixture from 7 liters to 14 liters and the amount of acid is unchanged, the solution will be half as strong.
3:2
2 and 10. 2*10=20 2+10=12
you can't mix developer with developer to make another developer
Equal parts of 10V. Developer + 20V. Developer= 15 Volume Developer
Equal parts of 10 & 30 V. developer will yield 20 v.
Mixing 10 Volume developer and 40 volume developer will never make a 20 volume regardless of how much is mixed. In order to make a 20 volume, equal parts of 10 and 30 volumes will need to be mixed. Mixing 10 and 40 will make 30 volume.
No, No you cannot. .... no you can't- but you can mix 10 with 30 volume! These strengths would equal 20 :)
20 volume
What is the difference between 10 and 20 volume creme developer?
Mixing 10 and 20 volume developers in equal amounts will yield a 15 volume developer.
NO. If you mix them in equal parts, that would give you 35 volume. To get 15 volume, mix equal parts of 10 and 20 volume.
Mix with 20 or 30 Volume Cream.
Mixing equal parts of 20 V. and 40 V. developers will give you an approximate 30 volume developer.
If you mix them in equal parts, you now have 25 volume developer.