LEMON SQUASH 1 part concentrate
to 2 parts water

If you put 140ml of water in a glass, how much concentrate should be added?

70ml

Step-by-step explanation:

concentrate is half of water ( 140/2=70)

3 parts of 70ml   in total    (210ml )  

2 parts of water70+70 of water= 140

1 part of concentrate 70 of concentrate

incomplete question. how do you expect anyone to you when you do not post the question in its entirety?

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6