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  • What is the length of foot of perpendicular drawn from the point P (3, 4, 5) on y-axis A. √41 B. √34 C. 5 D. None of these

What is the length of foot of perpendicular drawn from the point P (3, 4, 5) on y-axis
A. \sqrt{41}
B. \sqrt{34}
C. 5
D. None of these

Answers (1)

The answer is the option (b)\sqrt{ 34}

On y-axis, x = z = 0

Thus, A = (0,4,0)

Thus, PA = \sqrt{ (0-3)^{2}+(4-4)^{2}+(0-5)^{2} }

                  = \sqrt{ 9+0+25 } = \sqrt{ 34 }

Posted by

infoexpert22

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