In the adjoining figure, OABC is a square of side 7 cm. OAC is a quadrant of a circle with O as center. The area of the shaded region is

1. 10.5 cm²

2. 38.5 cm²

3. 49 cm²

4. 11.5 cm²

The adjoining figure shows a rectangle and a semicircle. The perimeter of the shaded region is

1. 70 cm

2. 56 cm

3. 78 cm

4. 46 cm

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

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

1. 44 cm

2. 88 cm

3. 66 cm

4. 132 cm