6. Find the area of the cardboard

Vimal crafts the model of a building using cardboard. The building is in the form of a hemisphere mounted on the cuboid. If the hemisphere is of radius 7 $cm$ and the cuboid is of dimension $83 cm \times 80 cm \times 85 cm$, then find the area of the cardboard required?

 

Answer:

 

The area of the cardboard required $=$  $cm^2$.

 

[Note: Use $\pi = \frac{22}{7}$.]