**(11)** A ship is 100 meters away from a lighthouse. If the angle of elevation from the ship to the top of the lighthouse is 10 degrees, what is the height of the lighthouse?

- (a) 10 meters
- (b) 50 meters
- (c) 17.64 meters
- (d) 25 meters

**(12)** A ladder of length 10 meters is placed against a vertical wall such that it makes an angle of 60 degrees with the ground. How high does the ladder reach on the wall?

- (a) 5 meters
- (b) 5√3 meters
- (c) 6 meters
- (d) 10 meters

**(13)** A person on the ground looks up at the top of a building. The angle of elevation is 40 degrees. If the person is 20 meters away from the building, how tall is the building?

- (a) 14 meters
- (b) 15 meters
- (c) 20 meters
- (d) 25 meters

**(14)** A ladder of length 15 meters is leaning against a wall. The base of the ladder is 9 meters away from the wall. What is the angle of elevation of the ladder?

- (a) 30 degrees
- (b) 45 degrees
- (c) 60 degrees
- (d) 75 degrees

**(15)** From the top of a 40-meter high building, a ball is thrown horizontally to the ground. How far from the base of the building does the ball land?

- (a) 20 meters
- (b) 40 meters
- (c) 60 meters
- (d) 80 meters