When an aeroplane is 800m above the ground, its angle of elevation from a point P on the ground is 30o. How far is the plane from P by line of sight?
-
A.
400m -
B.
800m -
C.
1500m -
D.
1600m -
E.
1700m
Correct Answer: Option D
Explanation
From the diagram, (sin 30 = frac{800}{x})
(x = frac{800}{sin 30} )
= (frac{800}{0.5} )
= 1600 m