The angle of elevation of the sun when the length of the shadow of a pole is equal to its height, is:

1. 30°

2. 45°

3. 60°

4. 90°

If the length of the string of a kite flying in the sky is twice the height of the kite from the ground, then the angle of elevation of the kite is:

1. 30°

2. 45°

3. 60°

4. none of these