It appears that the flag-pole is positioned on a hill or on elevated ground in reference to the boy.
So is the 70 m the distance along the slant or is it the horizontal distance ?
I will assume it is the horizontal distance
Make your sketch.
1. Horizontal height to base of flagpole:
tan69 = x/70
x = 70tan69
2. Horizontal height to top of the flagpole
tan 70 = y/70
y = 70tan70
height of pole = y - x
= ....
The question changes totally if the slant distance is 70 m
a boy standing 70m away from a flag–post observes that the angles of elevation of the top and bottom of the tower on top the flag–post are 70^ and 69^ respectively. Find the height of the tower
1 answer
1 answer