%My math sir gave me the answer : )
NOTE: Before running this code, you should have a viewSolid file in the current folder you saved your code. If you aren't aware of the viewSolid code, please open the below link, copy and then paste into a new script and save it as "viewSolid.m" and then run.
All the Best...!!!
syms x y z
I = int(int(y,y,0,sqrt(1-x^2)),x,-1,1)