10th Class
Mathematics
Sample Paper
Maths Olympiad Model Test Paper-14
question_answer
A crow is sitting on the top of a house. The house is 40 m high. The angle of elevation of the crow as seen from a point on the ground is \[45{}^\circ \]. The crow flies away horizontally and remains at a constant height. After 3 seconds the angle of elevation of the crow from the point of observation becomes\[30{}^\circ \]. Find the speed of the crow.