Pb - pole powierzni bocznych
a) Pb=1,5*4+2,5*4+1+2*4+1.5*4 = 4(1,5+2,5+1+2+1.5)=4*8,5=34 m^2
b) Pb= 2(2,25+3+1,5+2.25+3+1.5) = 2*13,5=27 cm^2
