A metallic sphere of radius 10.5 cm in melted and then recast into small cones, each of radius 3.5 cm and height 3 cm. The number of cones formed is :

1. 21

2. 63

3. 126

4. 130

A hemispherical bowl of internal radius 9 cm contains a liquid. This liquid is to be filled into cylindrical shaped small bottles of diameter 3 cm and height 4 cm. How many bottles will be needed to empty the bowl?

1. 27

2. 35

3. 54

4. 63

A hollow cylindrical drum has internal diameter of 30 cm and a height of 1 m. What is the maximum number of cylindrical boxes of diameter 10 cm and height 10 cm each that can be packed in the drum?

1. 60

2. 70

3. 80

4. 90

Ice-cream, completely filled in a cylinder of diameter 35 cm and height 32 cm, is to be served by completely filling identical disposable cones of diameter 4 cm and height 7 cm. The maximum number of persons that can be served in this way is :

1. 950

2. 1000

3. 1050

4. 1100