13. a vertical flagstaff is on the top of a building
which stands on level ground. from a point p
on ground level the angle of elevation of the top
of the flagstaff is observed to be 32%, and the
angle of elevation of the bottom of the flagstaff
to be 29º. from a point q on ground level,
75 m closer to the building, the angle of eleva-
tion of the top of the flagstaff is 38°.
calculate to three significant figures:
(a) the distance of p from the base of the
building
(b) the height of the building
(c) the length of the flagstaff.