The angle of elevation of a ladder leaning against a wall is 60º and the foot of the ladder is 4.6 m away from the wall.
What is the length of the ladder ?
Let AB is a vertical wall and BC is a ladder
<ACB=60 degree ,
Distance of ladder from wall=AC=4.6 m
AC/BC=cos 60 degree=1/2
Ans is 9.2 m
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