Here, we have
radius of hemispherical toy (r) = 3.5 cm
Now,
Total surface area = 3πr²

It is given that
Volume of sphere = Surface Area of sphere

Let V and ‘R’ be the radii of cylinder and cone respectively.
And ‘h’ and ‘H’ be the heights of cylinder and cone respectively.

Now volume of cylinder (v₁) = 
And, volume of cone (v₂) = 

Let r be the base radius and h be the height.
Then, volume of the cylinder i. e.,
V₁ = πr²h
and volume of the cone i.e.,



Hence, the required ratio is 3 : 1.