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

1. 140 cm²

2. 77 cm²

3. 294 cm²

4. 217 cm²

In the adjoining figure, the boundary of the shaded region consists of semicircular arcs. The area of the shaded region is equal to

1. 616 cm²

2. 385 cm²

3. 231 cm²

4. 308 cm²

In the adjoining figure, ABC is a right angled triangle at B. A semicircle is drawn on AB as diameter. If AB = 12 cm and BC = 5 cm, then the area of the shaded region is

1. (60 + 18π) cm²

2. (30 + 36π) cm²

3. (30 + 18π) cm²

4. (30 + 9π) cm²

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