Neco 2025 Mathematics Question 25

Practice objective / multiple choice question 25 from the 2025 Neco Mathematics examination.

Neco 2025 Mathematics Objective / Multiple Choice Medium Difficulty
Question 25 NECO • 2025 • MATHEMATICS • objective

A chemist mixes a solution containing \(12\%\) acid with another solution containing \(35\%\) acid. The total volume of the mixture before any loss is \(50\) L. After the mixture is left to stand, \(5\) L of pure water evaporates, and the concentration of the remaining solution becomes \(25\%\). Determine the volume (in litres) of each original solution used.

Answer Options

A. 12% solution ≈ 30.00 L, 35% solution ≈ 20.00 L
B. 12% solution ≈ 25.00 L, 35% solution ≈ 25.00 L
Correct Answer C. 12% solution ≈ 27.17 L, 35% solution ≈ 22.83 L
D. 12% solution ≈ 28.50 L, 35% solution ≈ 21.50 L
Correct Answer
C
Correct Option:
12% solution ≈ 27.17 L, 35% solution ≈ 22.83 L

About This Question

This is Neco 2025 Mathematics Question 25. It is one of the objective questions from the 2025 Neco Mathematics examination.

Difficulty level: Medium .

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