the angle of elevation of a ladder leaning against a wall is 60 º and the foot of the ladder is 4.6 m away from the wall . the length of the ladder is :
"let ab be the wall and bc be the ladder . then , acb = 60 º and ac = 4.6 m . ac / bc = cos 60 º = 1 / 2 bc = 2 x ac = ( 2 x 4.6 ) m = 9.2 m . answer : option d"
multiply(4.6, const_2)