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=72+6+9+18+ 36+80+64+32= 317cm2
obj= obj1+obj2+obj3+obj4
obj1= 3*4*4= 48
obj2= 8*4*3= 96
obj3= 4*10*3= 120
obj4= 3*3*6= 54
Obj= 48+96+120+54= 318 cm3
b) Pc= 2(20*12)+ 4(5*20) + 2(4*20) + 2(4*6) + 4(6*4)+ 8(4*3/2)=
480+400+160+48+96+48=
= 1232 cm2
obj= obj1+obj2
obj1= 2(20*12*4)= 960*2= 1920
obj2= 6*20*4=480
obj= 2400 cm3
poprawione i mam nadzieje ze juz dobrze :)