Question
Thu February 16, 2012 By:
 

An aeroplane at an altitude of 200m observes the angles of depression of 2 opposite points on 2 banks of the river to be 45degree and 60degree.find,in metres,the width of the river.answer with figure

Expert Reply
Fri February 17, 2012
Let x/200 = tan45 , y/200 = tan60
So , x = 200 , y = 200root3 = 346.4
Width = 546.4m
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