Question

Un paralelipiped dreptunghic are dimensiunile direct proportionale cu numerele 6,4 si 3 iar suma lungimilor este de 26 cm. Calculati
a_ lungimea dimensiunilor paralelipipedului
b)aria totala
c)volumul paralelipipedului

Answer 1

 [tex]Dimensiunile\;paralelopipedului:\;L\;;\;l\;si\;h\\ stiim \;ca:L+l+h=26cm\;si\;\;\frac{L}{6}=\frac{l}{4}=\frac{h}{3}=...=\frac{26}{13}=2\;\\ a).\;L=6*2=12cm\;;\;l=4*2=8cm\;;\;h=3*2=6cm\;;\\
c).\;V=12\cdot8\cdot6=576cm^2\;;\\
\\
b).\;A_t=A_l+2\cdotA_b=P_b\cdot{h}+2\cdot(12\cdot8)=40\cdot6+142=...[/tex]

Answer 2

$Dimensiunile~paralelipipedului~sunt:~L~,l\;si\;h\\Stim \;ca:L+l+h=26~cm\;si\;\;\frac{L}{6}=\frac{l}{4}=\frac{h}{3}=\frac{26}{13}=2\\\a)\\\L=6*2=12cm\;\\\;l=4*2=8cm\;\\h=3*2=6cm\;\\\\*c)\;V=12\cdot8\cdot6=576cm^2\\\\*b)\;A_t=A_l+2\cdotA_b=P_b\cdot{h}+2\cdot(12\cdot8)=40\cdot6+142=382$