\
Step 1:
\The function are
and
and 
The centroid of the region is
.
Where
and
.
The area of the region is
.
Upper curve is 
Lower curve is 


Step 2:
\The centroid is
.

Substitute
and
in above equation.

Step 3:
\
Substitute
and
in above equation.
.

The centroid of the region is 
Solution :
\The centroid of the region is 