Development view of rectangular prism

The character P is written to one face of a certain rectangular prism. Moreover, one diagonal line is drawn on each face of three faces.

Fig. 1 and Fig. 2 shows two types of the development view of this rectangular prism.

The length of the side AB is 14 cm.

(1) Draw three diagonal lines on Fig. 2 in handwriting.

(2) It is 24 cm when the length of the circumference of rectangle ABCD is subtracted from the length of the circumference (bold line) of the developed view of Fig. 1.

Moreover, it is 10 cm when the length of the circumference of the developed view of Fig. 1 is subtracted from the length of the circumference (bold line) of the development view of Fig. 2.

Find the volume of this rectangular prism.

Answer