A student sitting on a tower 68 metres high observes his principal’s car at the angle of depression of 20o. How far is the car from the bottom of the tower to the nearest metre?
- 184m
- 185m
- 186m
-
187m
The correct answer is: D
Explanation
Tan 20o = \(\frac{68m}{x}\)
x tan 20o = 68
x = \(\frac{68}{tan 20}\) = \(\frac{68}{0.364}\)
x = 186.8
= 187m
There is an explanation video available .