A man standing at a point X on the bank XY of a river that cannot be crossed, observes a tower to be N α° E on the opposite parallel bank. He then walks 200 m along the bank to the point Y towards East, and finds the tower to be N β° W. From the observation what is the breadth of the river will be(Given that the tanα° = 2 and tanβ° = 0.5)

A man standing at a point X on the bank XY of a river that cannot be c

1.	A man standing at a point X on the bank XY of a river that cannot be crossed, observes a tower to be N α° E on the opposite parallel bank. He then walks 200 m along the bank to the point Y towards East, and finds the tower to be N β° W. From the observation what is the breadth of the river will be(Given that the tanα° = 2 and tanβ° = 0.5)
A.	60 m
B.	70 m
C.	80 m
D.	90 m
Answer» D. 90 m