Sir, can i have the answers a bit more quickly???

Dear Student,

Here is the solution:

 Volume of the solid = Volume of the cone + volume of the cylindrical portion.

           

Here r=x cm  and  height of the cylinder  =  total height - height of cone =3h-h =2h                                        

 cm³

 cm³

Hence Proved.

Regards

Team Topperlearning