This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
The solid is a cone.

The side 12 cm becomes the altitude or the height of the apex or vertex of the cone generated.  The base of the cone is a circular area with a radius of 5 cm.

Volume of cone = 1/3 (π r²) h = 1/3 π 5²  * 12 = 100 π cm³