Matematyka pomocy mam 10minut

a) Pc = 6 • (4 dm •4 dm) = 6 • 16 dm2 = 96 dm2
V = 4 dm • 4 dm • 4 dm = 64 dm3
b) Pc = 2 • (3 cm • 4 cm + 3 cm • 5 cm + 4 cm • 5 cm ) = 2 • (12 cm2 + 15 cm2 + 20 cm2) = 2 • 47 cm2 = 94 cm2
V = 3 cm • 4 cm • 5 cm = 12 cm2 • 5 cm = 60 cm3