6. The length of the shadow of a tower is 20/3 metre. If the height of

1.	6. The length of the shadow of a tower is 20/3 metre. If the height of tower is 20 metrethen find the angle of elevation of the Sun at that time.
Answer» Height of the tower = AB = 20 m Length of the shadow = BC = 20√3 m the altitude of the Sun = <ACB tan <ACB = AB/CB = 20/20√3 = 1/√3 tan <ACB = tan 30° <ACB = 30°

6. The length of the shadow of a tower is 20/3 metre. If the height of tower is 20 metrethen find the angle of elevation of the Sun at that time.

Answer»

Height of the tower = AB = 20 m

Length of the shadow = BC = 20√3 m

the altitude of the Sun = <ACB

tan <ACB = AB/CB

= 20/20√3

= 1/√3

tan <ACB = tan 30°

<ACB = 30°