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Three Dimensional Geometry
Oswaal
CBSE
Grade 12

Question:

Distance of point $(2, 3, 4)$ from y-axis is:
(a) $\sqrt{20}$
(b) $\sqrt{13}$
(c) $\sqrt{25}$
(d) $3$

Step-by-Step Solution

Key Concept: \sqrt{x^2 + z^2} = \sqrt{4 + 16} = \sqrt{20} = 2\sqrt{5}.
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Correct Answer: $\sqrt{20}$
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