Mathematics
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
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
The angles of elevation of the top of a tower, 40 m high, from two points on the level ground on its opposite sides are 45° and 60°. The distance between the two points in nearest metres is :
60 m
61 m
62 m
63 m