Paper 1 · Mathematical Reasoning and Aptitude
UGC NET December 2021 June 2022 (14.10.2022) Shift-II
A 729 ml mixture contains milk and water in the ratio 7:2. How much more water should be added to get a new mixture with milk and water in the ratio 7:3?
A81 ml ✓ Correct
B90 ml
C85 ml
D75 ml
Correct answer: (A) 81 ml — The answer is 81 ml.
Explanation
★The answer is 81 ml.
★In 729 ml the milk is seven ninths, which is 567 ml, and water is 162 ml.
★The milk stays the same while water is added.
★For the new ratio 7 to 3, water must be three sevenths of the milk.
★Three sevenths of 567 is 243 ml of water.
★So the extra water needed is 243 minus 162, which is 81 ml.
★So the answer is 81 ml.
Want more like this? Create a free account to practise a full test, track your progress, and get spaced-repetition review.
Shared by Mcqkart · via Mcqkart.in