For the following questions answer them individually
A tower standing on a horizontal plane subtends a certain angle at a point 160 m apart from the foot of the tower. On advancing 100 m towards it, the tower is found to subtend an angle twice as before. The height of the tower is
$$\angle A, \angle B, \angle C$$ are three angles of a triangle. If $$\angle A - \angle B$$ = $$15^\circ$$, $$\angle B - \angle C$$ = $$30^\circ$$, then $$\angle A$$, $$\angle B$$ and $$\angle C$$ areÂ
In each of the following questions, select the related word/number from the given alternatives.