From an aeroplane above a straight road the angle of depression of two positions at a distance 20 m apart on the road are observed to be \[30{}^\circ \] and \[45{}^\circ \]. The height of the aeroplane above the ground is:

From an aeroplane above a straight road the angle of depression of two

1.	From an aeroplane above a straight road the angle of depression of two positions at a distance 20 m apart on the road are observed to be \[30{}^\circ \] and \[45{}^\circ \]. The height of the aeroplane above the ground is:
A.	\[10\sqrt{3}\,m\]
B.	\[10(\sqrt{3}-1)m\]
C.	\[10(\sqrt{3}+1)m\]
D.	20 m
Answer» D. 20 m

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From an aeroplane above a straight road the angle of depression of two positions at a distance 20 m apart on the road are observed to be \[30{}^\circ \] and \[45{}^\circ \]. The height of the aeroplane above the ground is:

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