Answer:
150 kg
Explanation:
The length of the diagonal:
sqrt(12² + 5²)
sqrt(169)
13
Total length:
2(13 + 12 + 5)
2(30)
60m
Mass;
60 × 2.5
The diagonal Piece: √5²+12² = 13
6 pieces: 5, 12, 5, 12, 13, 13
Total length: 2 x(5 + 12 + 13) = 60
Total weight: 60 x 2.5 = 150 kg
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