The Nice Observatory

 

This observatory was built in 1886 for a telescope with diameter 76 cm. It is made up of a cube with edge 22.40 m and a half-sphere with diameter equal to the edge of the cube.

The interior of the monument needs repainting.
Calculate the area in m².

round your answer to the nearest whole number.
  How many whole faces of the cube
have to be repainted?
faces