If x and y vary inversely to each other

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Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Algebra

Question:

If x and y vary inversely to each other and x = 7 when y = 12, then find y when x = 21.

Options:

Correct Answer:

Explanation:

∵ x and y are inversely

and x = 7, y = 12

Then xy = 12 × 7 = 84

Now if x = 21, then y = 84/21 = 4