I am sorry i don't have the options.
![Image](https://s2.postimage.org/B6G40.jpg)
How do you know the two arcs are quarter-circles?kuntalkkc wrote:quite easy...
half of the shaded region=area of quarter circle-half area of sq=Pi*1/4-1/2
total shaded region=2(pi/4-1/2)=pi/2-1=TT/2-1...ans option 4....any doubt?