**(a) Calculate the area of the shaded region.**

**(b) If the sides of a square are lengthened by 3 cm, the area becomes 121 cm2. Find the perimeter of the original square.**

**Solution:**

**More Solutions:**

- Calculate the area of the remaining piece of the rectangle.
- If the diameter of the largest is 14 cm.
- Find the area of the shaded region correct upto 2 decimal places.
- The area of the inscribed circle.
- Find the area of the sector OACB and of the major segment.
- Find the surface area and volume.
- Find the length of a diagonal.
- The length and breadth of a rectangular.
- How many cubic metres of air will each student have?
- Find the surface area and the volume of the cube.