The weight of a metallic right circular cylinder with base radius 10.5 cm and height 60 cm, it being given that 1 cm³ of metal weighs 5 gm, is :

1. 48.75 kg

2. 97.65 kg

3. 102.45 kg

4. 103.95 kg

If the diameter of the base of a closed right circular cylinder be equal to its height h, then its whole surface area is :

1. πh²

2. $\dfrac{3}{2}$ πh²

3. $\dfrac{4}{3}$ πh²

4. 2 πh²

The ratio between the radius of the base and the height of a cylinder is 2 : 3. If its volume is 1617 cm³ the total surface area of the cylinder is :

1. 308 cm²

2. 462 cm²

3. 540 cm²

4. 770 cm²

A solid cylinder has a total surface area of 231 cm². If its curved surface area is two-thirds of the total surface area, the volume of the cylinder is :

1. 269.5 cm³

2. 308 cm³

3. 363.4 cm³

4. 385 cm³