V=a*b*cS=2ab+2ac+2bcL=4a+4b+4cа)V=5.9*4*12=283.2, S=2(5.9*4+5.9*12+4*12)=284, L=4(5.9+4+12)=87.6в)V=0.67*0.85*2.25=1.43514, S=2(0.67*0.85+0.67*2.52+0.85*2.52)=8.7998, L=4(0.67+0.85+2.52)=16.16
V=a*b*c
S=2ab+2ac+2bc
L=4a+4b+4c
а)V=5.9*4*12=283.2, S=2(5.9*4+5.9*12+4*12)=284, L=4(5.9+4+12)=87.6
в)V=0.67*0.85*2.25=1.43514, S=2(0.67*0.85+0.67*2.52+0.85*2.52)=8.7998, L=4(0.67+0.85+2.52)=16.16