Given below are two overlapping unit circles. Find the area of the shaded region.
Approach 1: With the use of given figure. We can find out Option(a) is right answer.
Shortcut: From the 4 - π approach, each of the shaded region will be 10% of the square's area. Hence, the required area = 40% of 1= 0.4. Look in the answer options for this value. Only option(a) comes the closest. All answer options are far apart.