Two cylindrical vessels with radii 15 cm and 10 cm and heights 35 cm and 15 cm respectively are filled with water. If this water when poured into a cylindrical vessel, 15 cm in height, fills it completely then the radius of the vessel is :

1. 17.5 cm

2. 18 cm

3. 20 cm

4. 25 cm

A hollow garden roller 63 cm wide with a girth of 440 cm is made of iron 4 cm thick. The volume of the iron used is :

1. 154982 cm³

2. 106372 cm³

3. 107812 cm³

4. 107712 cm³

The radius and height of a right circular cone are in the ratio of 5 : 12 and its volume is 2512 cm³. The slant height of the cone is :

(Take π = 3.14)

1. 14 cm

2. 16 cm

3. 24 cm

4. 26 cm

How many metres of cloth 2.5 m wide will be required to make a conical tent whose base radius is 7 m and height is 24 m?

1. 120 m

2. 180 m

3. 220 m

4. 550 m