Question

The angle of elevation of a ladder leaning
against a wall is 60°. If the ladder is taken a m
away from the wall, the angle of elevation be-
comes 30° and the height of the wall which is
covered by the ladder is reduced to 2 m. Find
the value of a.​

Answer 1

Answer:

the correct answer is 9.2m

Step-by-step explanation:

Angle is 60 degree, on angle will be 90 degree, so 3rd angle is 30 degree.

Base = 4.6m

We need to to find the hypotenuse...

b / h = cos 30

4.6 / h = 1/2

=> h= 4.6 x 2 = 9.2m