Sagot :
1.
[tex]p = 3920 \times {15}^{2} \\ p = 882000 \: w[/tex]
2.
[tex]p = 3920 \times {40}^{2} \\ p = 6272000 \: w[/tex]
3.
[tex]p = 3920 \times {65}^{2} \\ p = 16562000 \: w[/tex]
Réponse:
A) P = 3 920×15² = 882 000
B) P = 3 920×40² = 6 272 000
C) P = 3 920×65² = 16 562 000