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Pp x h = (5 x 3) x 4 = 60cm3
x to razy
Pp=a*b
Pp=3cm*5cm=15cm²
Pb₁=½*a*h
Pb₁=½*3cm*6cm=9cm²
2Pb₁=9cm²*2=18cm²
Pb₂=½*a*h
Pb₂=½*5cm*4cm=10cm²
2Pb₂=10cm²*2=20cm²
4Pb=2Pb₁+2Pb₂
4Pb=18cm²+20cm²=38cm²
Pc=15cm²+38cm²=53cm²