In the given diagram ΔABC ∼ ΔEFG. If ∠ABC = ∠EFG = 60°, then the length of the side FG is:

1. 15 cm

2. 20 cm

3. 25 cm

4. 30 cm

If the volume of two spheres is in the ratio 27: 64, then the ratio of their radii is:

1. 3 : 4

2. 4 : 3

3. 9 : 16

4. 16 : 9