If the elevation of the Sun changes from 30° to 60°, then the difference between the lengths of shadows of a pole 15 m high, is
1
7.5 m
2
15 m
3
10√3 m
4
15√3 m
If the elevation of the Sun changes from 30° to 60°, then the difference between the lengths of shadows of a pole 15 m high, is