A student sitting on a tower 68 metres high observes his principal's car at the angle of depression of 20°. How far is the car from the bottom of the tower to the nearest metre?
A.
184 m
B.
185 m
C.
186 m
D.
187 m
Correct Answer: 187 m
Explanation
Tan 20° = 68m/x
x tan 20° = 68
x = 68/tan20 = 68/0.364
x = 186.8
= 187m
Tan 20° = 68m/x
x tan 20° = 68
x = 68/tan20 = 68/0.364
x = 186.8
= 187m