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(b)
A tower on the bank of a river is of 37.8 m height
and the angle of elevation of the top of the tower
from the opposite bank is 60°, observed by a
man of height 1.8 m then, answer the following
questions.
(i) Define angle of elevation.
(ii) Find the breadth of the river.
(iii) Find the distance between man and the
tower when the man observes the top of
the tower at the angle of elevation 45°.
(iv) When the man observes at the top of the
tower, how far should he move forward or
backward from his current position so that
the angle of elevation is 30°?