Question

Calculate the distance between A (7, 3) and B which lies on the x-axis and whose abscissa is 11.

Answer 1

Coordinates of 'B' are $(11,0)$

$\Rightarrow AB=\sqrt{(7-11{)}^2+(3-0{)}^2}$

$\Rightarrow AB=\sqrt{4^2+3^2}=5unit$