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Question

If 11.6: x :: x: 2.9, and x > 0, then find the value of x.

This question was previously asked in
RRB NTPC 2024 Undergraduate CBT 1 Question Paper (29-Aug-2025) (Shift 1)
The correct answer is

5.8

We have a proportion given by the statement 11.6 : x :: x : 2.9. This means that the ratio of 11.6 to x is equal to the ratio of x to 2.9. Mathematically, this can be expressed as:

11.6/x = x/2.9

To find the value of x, we can cross-multiply:

11.6 * 2.9 = x * x

This simplifies to:

33.64 = x2

To solve for x, take the square root of both sides:

x = √33.64

Calculating the square root gives:

x = 5.8

Therefore, the value of x is 5.8.

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