Mathematics
If the angles of elevation of a tower from two points distant a and b (a b) from its foot and in the same straight line from it and on the same side, are 30° and 60°, then the height of the tower is : 1. 2. 3. 4.
Related Questions
If from the top of a cliff, 100 m high, the angles of depression of two ships at sea are 60° and 30°, then the distance between the ships is approximately :
57.6 m
115.47 m
173 m
346 m
A boat is being rowed away from a cliff, 150 m high. At the top of the cliff, the angle of elevation of the boat changes from 60° to 45° in 2 minutes. The speed of the boat is:
1.9 km/hr
2 km/hr
2.4 km/hr
2.5 km/hr