Question

If distance of a point (k, 4) from origin is 5 units then find the value of k.

Answer 1

3

hope it helps.......

Answer 2

let the origin point be A (0,0)

and other point p ( k,4)

given distance between them is 5

use distance formula

$d = \sqrt{(x2 - x1) {}^{2} } (y2 - y1) {}^{2}$

then put the values

you get

$5 = \sqrt{k {}^{2} + 4 {}^{2} }$

$25 - 16 = k {}^{2}$

$k = - 3 \: or + 3$

I hope it helps you