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Answer:
The quantity of 70% saline solution chemist need is 4 liters
Step-by-step explanation:
Given as :
The quantity of 25% saline solution = 8 liters
Let The quantity of 70% saline solution chemist need = x liters
The quantity of 40% saline solution mixture = (x+8) liters
Now, According to question
∵<u>The mixture is created with solutions </u>
So, 25% of quantity of saline + 70% of quantity of saline = 40% of quantity of mixture
Or, 25% of 8 liters + 70% of x liters = 40% of (x+8) liters
Or, × 8 +
× x =
× (x+8)
Or, +
=
Or, 200 + 70 x = 40 × (x+8)
Or, 200 + 70 x = 40 x + 320
Or, 70 x - 40 x = 320 - 200
Or, 30 x = 120
∴ x =
i.e x = 4 liters
So,The quantity of 70% saline solution chemist need = x = 4 liters
Hence, The quantity of 70% saline solution chemist need is 4 liters Answer