The solid is a cone The radius of the cone is $= 1.8$ cm.
The slope height of the cone $= 12.9$ cm.
Find the value of the area for the cone part
area is $cm ^2$ .
Find the value of the area for the base circle
area is $cm ^2$ .
Find the value of the total area for the solid (cone side plus base)
total area is $cm ^2$ .