Question

A ladder is standing against a wall 12 metre in height at a distance of 5 metre length of ladder is
Option. A. 17m
B.13m
C.13.5m
D.7m​

Answer 1

Height=12m=perpendicular

Distance=5m=base

length of ladder=?=hypotenuse=x

According to pythagoras theorem,

${x}^{2} = {base}^{2} + {perpendicuar }^{2}$

${x}^{2} = {5}^{2} + {12}^{2}$

${x}^{2} = 25 + 144$

${x}^{2} = 169$

$x = \sqrt{169}$

$x = 13$

Answer:
The length of the ladder is 13m.

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