Respostas

2014-05-25T20:12:16-03:00
Dimensoes:
a=3x
b=4x
c=5x

a ordem de quem vc chama de a,b ou c nao interfere na conta

Volume=abc
75000=3x.4x.5x
75000=60x³
1250=x³
x=∛1250
x=5∛10 cm

dimensoes sao :
a=3x
a=3.5∛10
a=15∛10 cm

b=4x
b=4.5∛10
b=20∛10 cm

c=5x
c=5.5.∛10
c=25∛10 cm

Area total=2(AB+AB+BC)
At=2(15∛10.20∛10+15∛10.25∛10+20∛10.25∛10)
At=2(300∛10² + 375√10² + 500∛10²)
At=2(1175∛10)
At=2350∛10² cm³