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Mathematics, 04.02.2020 21:56 silveryflight

Bob bought a solid rubber doorstop to keep the air flowing between the rooms of his apartment.

sides: 1.5 cm, 2 cm, 2.5 cm, 5 cm

what is the minimum amount of rubber used to make the doorstop?
a) 5cm^2
b) 7.5cm^2
c) 32cm^3
d) 33cm^3

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