The perimeter of the shaded region shown in the below figure is

1. (30 + 6π) cm

2. (30 + 12π) cm

3. (18 + 12π) cm

4. (18 + 6π) cm

If the volume of a cube is 729 m³, then its surface area is

1. 486 cm²

2. 324 cm²

3. 162 cm²

4. None of these

The length of the longest pole that can be put in a room of dimensions (10 m × 10 m × 5 m) is

1. 15 m

2. 16 m

3. 10 m

4. 12 m

The lateral surface area of a cube is 256 m². The volume of the cube is

1. 512 m³

2. 64 m³

3. 216 m³

4. 256 m³