The angle of elevation of a ladder against a wall is 45o. The length of the ladder is 12 m. What is the distance between the wall and the foot of the ladder?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 6√2 m.
From the following figure
Here, AC is taken as the ladder
AC = 12 m
In the ΔABC
⇒ cos 45° = BC/AC
⇒ 1/√2 = BC/12
⇒ BC = 12/√2
⇒ BC = 6√2