A solid toy is in the shape which is a combination of a cylinder, cone and a hemispherical bowl. The cylinder contributes to 50% of the total volume of the toy, the cone contributes to 20% of the volume. Find the ratio of the contribution (in terms of volume) of the cone, cylinder and hemisphere.

2 : 5 : 3

If the cylinder contributes = 50% of the total volume.

The  cone contributes = 20% of the total volume.

The hemispherical bowl contributes = 30% of the total volume.

The ratio of the three volumes = 20 : 50 : 30 = 2 : 5 : 3.