A solid piece of iron in the form of a cuboid of dimensions $49 \mathrm{cm}\times 33 \mathrm{cm}\times 24 \mathrm{cm}$ is moulded to form a solid sphere. The radius of the sphere is 

Calculate the surface area of the solid shown in the figure excluding the bottom surface:

Quantity $1$: Area of square is $324 {\mathrm{cm}}^2$, whose perimeter is equal to perimeter of rectangle. Length of the rectangle is $4 \mathrm{cm}$ more than breadth of the rectangle. Find the area of rectangle.

Quantity $2$: $320 {\mathrm{cm}}^2$.

What are respectively the curved surface area and volume of a hemisphere of radius $21 \mathrm{cm}?$

(Take $\pi =\frac{22}{7}$)

In the following figure, hemisphere is placed at the bottom of the plastic bucket as shown in the figure. If curved surface area of the bucket is $A$,curved surface area of hemisphere is $B$, area of the bottom of the bucket is $C$ and total surface area of hemisphere is $D$, then total surface area of this model is _____