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levacccp [35]
3 years ago
15

HELPPPPPPPPPPPP[PPPPPP

Mathematics
1 answer:
S_A_V [24]3 years ago
8 0

Answer:

26mm

Step-by-step explanation:

w+10 + w+ 20 = 144/3

3w+30 = 48

3w = 18

w=6

longest side is 6+20 = 26

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