### Home > CALC > Chapter Ch2 > Lesson 2.1.3 > Problem 2-39

2-39.

Calculate the volume of the solid formed by rotating the flag bound by the *x*- and *y*-axes and *y*-axis. Homework Help ✎

The area contained in the first quadrant is under a quarter-circle.

The flag will be rotated about the *y*-axis. This will result in the same volume as rotating about the *x*-axis.

The resultant 3D figure will be a half-sphere.