Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test Quantitative Aptitude Trigonometry Heights and Distances
As observed from the top of a light house, 120\( { \sqrt{3}}\) m above the sea level, the angle of depression of a ship sailing towards it changes from 30° to 60°. The distance (in m) travelled by the ship during period of observation is:
1
100
2
240
3
150
4
More than one of the above
5
None of the above