Question

If a 30 meter ladder is placed against a 15m wall such that it just reaches the top of the wall then the elevation of wall is equal to

Answer 1

Answer:

15

Step-by-step explanation:

u just put it in 15m

Answer 2

Given :

Length of Ladder = 30 m  

Ladder is placed against 15 m wall

To Find:

Elevation of wall  

Solution:

Length of ladder = Hypotenuse = 30 m  

Length wall = Perpendicular = 15 m  

Formula :

$Sin \theta = \frac{Perpendicular}{Hypotenuse}\\Sin \theta = \frac{15}{30}\\Sin \theta =\frac{1}{2}\\\theta = Sin^{-1}(\frac{1}{2})\\\theta = 30^{\circ}$

Hence The elevation of wall is equal to 30 °