Question

A ladder 9m long reaches a point 9m below the flagstaff from the foot of the ladder the angle of elevation of the top of flagstaff is 60 find the height of flagstaff

Answer 1

let height of flag staff be (x)m.

Ladder of 9m

Length between flag staff and ladder is also 9m.

so,

tan60=p/b

1/√3=x/9

9=√3x

x=9/√3m.