If x is inversely proportional to y and

CUET Preparation Today

Start Free Mocks

Home Questions 2FQWHVFKBR

Target Exam

CUET

Subject

General Test

Chapter

Numerical Ability

Topic

Ratios

Question:

If x is inversely proportional to y and y is directly proportional to z, then xy is :

Options:

Directly proportional to y

Inversely proportional to y

Constant

Directly proportional to $y^2$

Correct Answer:

Constant

Explanation:

x is proportional to y.

Therefore, x/y=a (a is a constant)

y is proportional to z, so:

y/z=b (b is a constant)

Multiplying both the equations, we get:

x/y×y/z=a×b

x/z=ab (ab is a constant)