👤

daca L=7cm h =4cm si V=140 cm aflati l At si d

Răspuns :

l=140:(7x4)=5cm
l=5cm             at nu stiu ce e , si nici d
V=L*l*h=140
l=V/L*h=140/7*4=5 cm
Ab=L*l=7cm*5cm=35 cm^2
Al=2(L*h+l*h)=2(7*4+5*4)=2*48=96 cm^2
At=Al+2Ab=96+2*35=166 cm^2...succese (diagonala din pacate nush..)