Assertion (A) : The perimeter of one face of a cube is 20 cm. Its volume is 64 cm³.

Reason (R) : Volume of a cube of edge a is given by a³.

1. A is true, R is false

2. A is false, R is true

3. Both A and R are true

4. Both A and R are false

The area of a base of a cuboidal water tank is 6500 cm² and the volume of water contained in it is 2.6 m³. The depth of the water is :

1. 5 m

2. 4 m

3. 3.5 m

4. 3 m

In the figure, four faces of the solid are shaded. The shaded area is :

1. 100 cm²

2. 150 cm²

3. 200 cm²

4. 300 cm²