The distance of the point (4.5,7,6) from the y-axis is ___.

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Question

The distance of the point (4.5,7,6) from the y-axis is ___.

Options:

A . 4.5 units

B . 6 units

C . 7 units

D . 7.5 units

Answer: Option D
:
D

The distance of a point P(x,y,z) from the y-axis is
$d = \sqrt{x^{2} + z^{2}} = \sqrt{{4.5}^{2} + 6^{2}} = 1.5 \times \sqrt{3^{2} + 4^{2}} = 1.5 \times 5 = 7.5 u n i t s$

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