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PB= 2(4.2)+ 2(3.5)
PB=8.4+7
PB= 15.4
Al= 15.4x5=77 cm
V= ABXH
V=4.2 x 3.5 x 5= 73.5 cm
At= Al+2Ab
At= 77+ 15.4= 92.4 cm
Nota: 4.2+3.5= 7.7x2=15.4